This website uses cookies to ensure you get the best experience. Learn more

condensing

condensing Sentence Examples

  • Oxazoles are produced on condensing phenacyl bromide with acid-amides (M.

    3
    0
  • The pyrimidines may be obtained by condensing I.

    3
    1
  • The diketotetrahydrotriazoles, or urazoles, are formed by condensing urea derivatives with hydrazine salts, urazole itself resulting by the action of urea or biuret on hydrazine or its salts.

    2
    0
  • Triethyl silicol, (C2H5),Si OH, is a true alcohol, obtained by condensing zinc ethyl with silicic ester, the resulting substance of composition, (C2H5)3 SiOC2H51 with acetyl chloride yielding a chloro-compound (C2H5)3SiC1, which with aqueous ammonia yields the alcohol.

    2
    0
  • We may evaporate some of the solvent from the solution which has become weaker and thus reconcentrate it, condensing the vapour on the solution which had become stronger.

    2
    2
  • It is extremely hygroscopic and is 'used in synthetical organic chemistry as a condensing agent.

    1
    0
  • This steam condensing adds to the water in the pipe and naturally causes an overflow, which is led back to the boiler and re-used.

    1
    1
  • A more general designation is "pyrogenic processes," which also includes such operations as leading vapours through red-hot tubes and condensing the products.

    1
    1
  • The more complex phenazines, such as the naphthophenazines, naphthazines and naphthotolazines, may be prepared by condensing ortho-diamines with ortho-quinones (0.

    0
    0
  • The mono-amino derivatives or eurhodines are obtained when the arylmonamines are condensed with orthoamino zo compounds; by condensing quinone dichlorimide or para-nitrosodimethyl aniline with monamines containing a free para position, or by oxidizing ortho-hydroxydiaminodiphenylamines (R.

    0
    0
  • Gmelin availed himself of every publication he could, but he perhaps found his richest booty in the labours of Latham, neatly condensing his English descriptions into Latin diagnoses, and bestowing on them binomial names.

    0
    0
  • In order to separate the distillate into various fractions, and to remove as much of it as possible free from condensed steam, it is now usual to employ condensing appliances of special form with outlets for running off the different fractions.

    0
    0
  • 7-trihydroxyxanthone, is found in the form of its methyl ether (gentisin) in gentian root; it is obtained synthetically by condensing phloroglucin with hydroquinone carboxylic acid.

    0
    0
  • Its tetramethyl-diamino derivative, which is formed by condensing formaldehyde with dimethyl-meta-aminophenol and subsequent elimination of water from the resulting diphenyl methane derivative, is the leuco base of pyronine, into which it passes by oxidation.

    0
    0
  • CH :CH (OH), formed by acting on formic ester with acetone in the presence of sodium ethylate, readily yields [1.3.51-triacetylbenzene, C 6 H 3 (CO CH 3) 3; oxymethylene acetic ester or formyl acetic ester or ß-oxyacrylic ester, (HO)CH :CH CO 2 C 2 H 51 formed by condensing acetic ester with formic ester, and also its dimolecular condensation product, coumalic acid, readily yields esters of [1.3.

    0
    0
  • Saturated steam is steam in contact with liquid water at a temperature which is the boiling point of the water and condensing point of the steam; superheated steam is steam out of contact with water heated above this temperature.

    0
    0
  • Paal has also obtained pyrrol derivatives by condensing acetophenone-acetoacetic-ester with substances of the type NH2R.

    0
    0
  • They are prepared by condensing thio-amides with a-haloid ketones or aldehydes, the thio-amide reacting as the tautomeric thio-imino acid.

    0
    0
  • Dihydrothiazoles, or thiazolines, are obtained by condensing ethylene dibromides with thio-amides; by the action of a-haloid alkylamines on thio-amides (S.

    0
    0
  • Darzens (Comptes Rendus, 1904, 139, p. 1214) prepares esters of disubstituted glycidic acids, by condensing the corresponding ketone with monochloracetic ester, in the presence of sodium ethylate.

    0
    0
  • Such a plate has the power of a condensing lens, and gives an illumination out of all proportion to what could be obtained without it.

    0
    0
  • Busch (Ber., 1905, 38, pp. 856, 4049) has isolated a series of bridged ring compounds which he describes as endo-iminodihydrotriazoles, the triphenyl derivative (annexed formula) being prepared by condensing triphenylaminoguanidine with formic acid.

    0
    0
  • Formic acid yields acridine, and the higher homologues give derivatives substituted at the meso carbon atom, N N +[[Hcooh-C 6 H 5 /Inc6h5->C6h4 C6h4 Cho Ch N N +Ch 3 000h->C 6 H 5 /IC 6 H 5 --C 6 H 4 C6h4 Coch 3 C]](CH3) Acridine may also 1:e obtained by passing the vapour of phenylortho-toluidine through a red-hot tube (C. Graebe, Ber., 1884, 17, p. 1 37 0); by condensing diphenylamine with chloroform, in presence of aluminium chloride (0.

    0
    0
  • Koerner (Ber., 1884, 17, p. 203) by condensing ortho-nitrobenzaldehyde with aniline, the resulting ortho-nitro-para-diamino-triphenylmethane being reduced to the corresponding orthoamino compound, which on oxidation yields chrysaniline.

    0
    0
  • Taurke (Ber., 1905, 38, p. 1663) by condensing silicon halides with alkyl chlorides in the presence of sodium: SiC14-1-4R Cl+8Na= SiR 4 +8NaCI; SiHC1 3 +3R.

    0
    0
  • The ketone, dihydroxyacetone, CH 2 OH CO CH 2 OH, was obtained by Piloty by condensing formaldehyde with nitromethane, reducing to a hydroxylamino compound, which is oxidized to the oxime of dihydroxyacetone; the ketone is liberated by oxidation with bromine water: 3H CHO + CH 3 NO 2 -- (CH 2 OH) 3 C NO 2 - (CH 2 OH) 3 C NH OH -- (CH 2 OH) 2 C: NOH - > (CH20H)2CO.

    0
    0
  • It also results on condensing acetylene, and on reducing phenylacetylene by zinc dust and acetic acid.

    0
    0
  • Those substituted in the benzene nucleus are obtained by condensing two molecules of a substituted benzyl and benzal chlorides.

    0
    0
  • It is formed by the condensation of acetylene tetrabromide with benzene in the presence of aluminium chloride: Br CH Br CH C H +C6H6=4HBr+C6H4) I, )C6H4, Br CH Br CH and similarly from methylene dibromide and benzene, and also when benzyl chloride is heated with aluminium chloride to 200° C. By condensing ortho-brombenzyl bromide with sodium, C. L.

    0
    0
  • in the "Lusitania," the steam traverses vertical copper coils tinned inside and outside; the coils are crescent-shaped, a form which gives a greater condensing surface and makes the coils self-scaling.

    0
    0
  • H 3 C CO NH 3 CO CH 3 H3C C - NH - C CH3 On nitration it yields chiefly meta-nitro-benzaldehyde, crystallizing in needles which melt at 58° C. The ortho-compound may be obtained by oxidizing ortho-nitrocinnamic acid with alkaline potassium permanganate in the presence of benzene; or from ortho - nitrobenzyl chloride by condensing it with aniline, oxidizing the product so obtained to ortho-nitrobenzylidine aniline, and then hydrolysing this compound with an acid (Farben fabrik d.

    0
    0
  • Various modifications have been made in the form of the condensing apparatus, the Guttmann condenser (Jour.

    0
    0
  • This consists of a series of vertical earthenware condensing tubes through which compressed air is passed in order to reduce the quantity of nitrogen peroxide to a minimum.

    0
    0
  • Jour., 1860, 158, p. 146); by heating aniline for red with nitrobenzene, concentrated hydrochloric acid and iron (Coupier, Ber., 1873, 6, p. 423); or by condensing formaldehyde with aniline and ortho-toluidine and oxidizing the mixture.

    0
    0
  • Acetyl acetone, CH 3 CO CH 2 CO CH 3, may be prepared by the action of aluminium chloride on acetyl chloride, or by condensing ethyl acetate with acetone in the presence of sodium (L.

    0
    0
  • Acetonyl acetone, CH 3 CO CH 2 CH 2 CO -CH a liquid boiling at 194° C., may be obtained by condensing sodium aceto-acetate with mono-chloracetone (C. Paal, Ber., 1885, 18, p. 59), CH3000H2C1+Na CH [[Coch3(Coor) ->Ch3co Ch2 Ch 000h,(Coor) -Ch3co]] CH2 CH2 000H3; or by the hydrolysis of diaceto-succinic ester, prepared by the action of iodine on sodium aceto-acetate (L.

    0
    0
  • Claisen by condensing ethoxymethylene aceto-acetic esters and similar compounds with /3-ketonic esters and with 1.3 diketones.

    0
    0
  • The ethoxymethylene aceto-acetic esters are prepared by condensing aceto-acetic ester with ortho-formic ester in the presence of acetic anhydride (German patents 77354, 79087, 79863).

    0
    0
  • Bernthsen); by the action of ammonium chloride or hydrochlorides of amines on nitriles; by condensing amines and amides in presence of phosphorus trichloride; by the action of hydrochloric acid on acid-amides (0.

    0
    0
  • Parabanic acid (oxalyl urea), C0[NH C0] 21 is formed by oxidizing uric acid; or by condensing oxalic acid and urea in the presence of phosphorus oxychloride.

    0
    0
  • 1888 [6], 14, p. 44 1); by the action of carbon dioxide on monobrombenzene in the presence of sodium; by condensing benzene And carbonyl chloride in presence of aluminium chloride, the benzoyl chloride formed being subsequently hydrolysed; and similarly from benzene and chlorformamide: C6H6 +Cl Conh 2 = Hc1 -C6h,CONH2, the benzamide being then hydrolysed.

    0
    0
  • The gaseous mixture, issuing from the latter, is washed with water in the usual condensing apparatus, to remove the 40 or 50 parts of hydrochloric acid left unchanged, and can then be immediately employed for the manufacture of chlorate of potash.

    0
    0
  • Lagodzinski (Berichte, 1895, 28, p. 1427) has synthesized alizarin by condensing hemipinic acid [(CH30)2C6H2(COOH)2] with benzene in the presence of aluminium chloride.

    0
    0
  • It is obtained by condensing benzal chloride with mercury diphenyl (Kekule and Franchimont, Ber., 1872, 5, p. 907); from benzal chloride or benzotrichloride and zinc dust or aluminium chloride; from chloroform or carbon tetrachloride and benzene in the presence of aluminium chloride; and deamidating diand tri-aminotriphenylmethane with nitrous acid and alcohol (0.

    0
    0
  • It does not seem probable, however, that they can escape the fate of ultimately condensing into one confused mass.

    0
    0
  • Thus in the first stage of a star's history we find it gradually condensing from a highly diffused gaseous state, and growing hotter as it does so.

    0
    0
  • When evolution to that which is taking place in double stars; the latter appear to be separating from a single original mass and the former condensing into one.

    0
    0
  • The specific heat of steam was determined shortly afterwards by Regnault (Comptes Rendus, 36, p. 676) by condensing superheated steam at two different temperatures (about 125° and 225° C.) successively in the same calorimeter at atmospheric pressure, and taking the difference of the total heats observed.

    0
    0
  • When employing a Volta condensing electroscope, the following is the method of procedure: - The top of the electroscope consists of a flat, smooth plate of lacquered brass on which another plate of brass rests, separated from it by three minute fragments of glass or shellac, or a film of shellac varnish.

    0
    0
  • 749) they are the custodians of the gates of Olympus, which they open or shut by scattering or condensing the clouds; that is, they are weather goddesses, who send down or withhold the fertilizing dews and rain.

    0
    0
  • They are obtained by condensing a halogen derivatives of ketones with acid-amides (M.

    0
    0
  • An ordinary formula for obtaining it is 1 S for highpressure engines, and S for condensing engines, where D is the diameter of the piston in inches and S the length of the stroke in feet, though varying numbers are used for the divisor.

    0
    0
  • The useful residue, known as the "actual," "effective" or "brake" horse-power, can be directly measured by a dynamometer; it amounts to about 80% of the indicated horse-power for good condensing engines and about 85% for non-condensing engines, or perhaps a little more when the engines are of the largest sizes.

    0
    0
  • Fischer has used it as a condensing agent in the preparation of aand 0-acrose from acrolein dibromide.

    0
    0
  • The idea that this film of bacteria oxidizes the alcohol beneath by merely condensing atmospheric oxygen in its interstices, after the manner of spongy platinum, has long been given up; but the explanation of the action as an incomplete combustion, depending on the peculiar respiration of these organisms - much as in the case of nitrifying and sulphur bacteria - is not clear, though the discovery that the acetic bacteria will not only oxidize alcohol to acetic acid, but further oxidize the latter to CO 2 and 01-1 2 supports the view that the alcohol is absorbed by the organism and employed as its respirable substance.

    0
    0
  • It may be prepared by distilling calcium benzoate; by condensing benzene with benzoyl chloride in the presence of anhydrous aluminium chloride; by the action of mercury diphenyl on benzoyl chloride, or by oxidizing diphenylmethane with chromic acid.

    0
    0
  • Soc., 1895, 17, p. 187) manufactures it by passing the vapour of acetic acid through a rotating iron cylinder containing a mixture of pumice and precipitated barium carbonate, and kept at a temperature of from 500° C. to 600° C. The mixed vapours of acetone, acetic acid and water are then led through a condensing apparatus so that the acetic acid and water are first condensed, and then the acetone is condensed in a second vessel.

    0
    0
  • Ruhemann prepared y-substituted dioxypyridines by condensing alkyl-dicarboxy-glutaconic esters with ammonia.

    0
    0
  • Hantzsch (Ber., 1886, 19, p. 31) by condensing methyl iodide and potassium nicotinate at 150° C. the resulting iodide being then decomposed by moist silver oxide.

    0
    0
  • The carbon disulphide and salicylic aldehyde products have also been used as means of distinction, as has also the formation of the stilbazonium bases obtained by condensing ortho-semidines with benzil (0.

    0
    0
  • The temperature is now raised to a white heat, and the product led by malleable iron pipes into condensing troughs containing water, when it condenses.

    0
    0
  • It may be conveniently prepared by passing a rapid current of air over burning phosphorus contained in a combustion tube, and condensing the product in a metal condenser, from which it may be removed by heating the condenser to 50 0 -60° (Thorpe and Tutton, Jour.

    0
    0
  • condensing power of gravitation at the sun's borders is the pressure of radiation.

    0
    0
  • The confines of the sun are visibly in a state of turmoil, for which a sufficient cause can be assigned in the relative readiness with which the outer portions part with heat to space, and so condensing produce a state of static instability, so that the outer surface of the sun in place of being fixed is continually circulating, portions at high temperatures rising rapidly from the depths to positions where they will part rapidly with their heat, and then, whether perceived or not, descending again.

    0
    0
  • Quinaldine (a-methylquinoline) is present in coal-tar; it may be prepared by condensing aniline with paraldehyde and concentrated hydrochloric acid (0.

    0
    0
  • Quinaldine may also be obtained by condensing ortho-aminobenzaldehyde with acetone in presence of caustic soda (P. Friedlander, loc. cit.).

    0
    0
  • It is a colourless liquid which boils at 247° C. The -CH 3 group is very reactive, condensing readily with aldehydes and with phthalic anhydride.

    0
    0
  • It may be prepared synthetically by condensing ortho-aminoacetophenone with paraldehyde and caustic soda (L.

    0
    0
  • It may also be prepared by condensing ay-dimethylquinoline and formaldehyde, the resulting a-ethanollepidine, C9H5 CH3N(CH2 CH2.OH), breaks down on heating and forms lepidine (W.

    0
    0
  • Originally prepared by heating alum, green vitriol and other sulphates, and condensing the products of distillation, sulphuric acid, or at least an impure substance containing more or less sulphur trioxide dissolved in water, received considerable attention at the hands of the alchemists.

    0
    0
  • We also note the Faure and Kessler apparatus, which consists of a platinum pan, surmounted by a double-walled leaden hood, in such a manner that, while the hood is constantly cooled from the outside by water, the thin acid condensing on its inside is carried away without being allowed to flow back into the pan.

    0
    0
  • wished to remedy this condition of affairs, and gave to his penitentionary, the Dominican Raymond of Pennaforte, the task of condensing the five compilations in use into a single collection, freed from useless and redundant documents.

    0
    0
  • The esters of the acids may also be obtained by condensing sodio-malonic ester with a-halogen derivatives of unsaturated acids: CH H?

    0
    0
  • Wislicenus, Ann., 18 93, 2 75, p. 312), is also obtained by the action of sodium on the esters of pimelic acid; by the distillation of calcium succinate; and by hydrolysis of the cyclopentanone carboxylic acid, obtained by condensing adipic and oxalic esters in the presence of sodium ethylate.

    0
    0
  • C 6 H 7 0, is obtained by condensing sodium aceto-acetate with methylene iodide, the ester so formed being then hydrolysed.

    0
    0
  • Buchner (Ber., 1898, 31, p. 2242) they may be represented as follows: The a-acid (a-isophenylacetic acid) is obtained by the hydrolysis of pseudophenylacetamide, formed by condensing diazoacetic ester with benzene, the resulting pseudophenyl acetic ester being then left in contact with strong ammonia for a long time.

    0
    0
  • The operation of efficient condensing is not by any means as simple as might be supposed.

    0
    0
  • (a) Condensing the tar in the ordinary way, and afterwards using the whole or portions of it for cracking into a permanent gas.

    0
    0
  • The national spirit, vaporized into a cosmopolitan mist, was fast condensing again under mortification and insult from abroad uncompensated by any appreciable percentage of cash profit.

    0
    0
  • By condensing arsenic vapour in a glass tube, in a current of an indifferent gas, such as hydrogen, amorphous arsenic is obtained, the deposit on the portion of the tube nearest to the source of heat being crystalline, that farther along (at a temperature of about C.) being a black amorphous solid, while still farther along the tube a grey deposit is formed.

    0
    0
  • It is obtained commercially by roasting arsenical pyrites in either a Brunton's or Oxland's rotatory calciner, the crude product being collected in suitable condensing chambers, and afterwards refined by resublimation, usually in reverberatory furnaces, the foreign matter being deposited in a long flue leading to the condensing chambers.

    0
    0
  • In the amorphous condition it can be obtained by condensing the vapour of the oxide at as high a temperature as possible, when a vitreous mass is produced, which melts at 200° C., has a specific gravity of 3.68-3.798, and is more soluble in water than the crystalline variety.

    0
    0
  • Uvitic acid, 5-methyl isopthalic acid, is obtained by oxidizing mesitylene or by condensing pyroracemic acid with baryta water.

    0
    0
  • Since, however, only relatively low powers are now employed, the ordinary rack and pinion movement for focusing suffices, and for the illuminating the object only a mirror below the stage is required when the object is transparent, and a condensing lens above the stage when opaque.

    0
    0
  • The solution of the extracted oil or fat is then transferred to a steam-heated still, where the solvent is driven off and recovered by condensing the vapours in a cooling coil, to be used again.

    0
    0
  • On the other hand, a great advantage is gained in the absorption machine by using the direct heat of the steam, without first converting it into mechanical work, for in this way its latent heat of vaporization can be utilized by condensing the steam in the coils and letting it escape in the form of water.

    0
    0
  • Two of the class were modified with rectangular saddle tanks and condensing apparatus for use in Wapping tunnel, Liverpool.

    0
    0
  • Instead there are condensing communal boilers feeding each pod.

    0
    0
  • condensed there are condensing communal boilers feeding each pod.

    0
    0
  • condensead to be changed to revolving condensing apparatus.

    0
    0
  • condenseect it may be moisture from our showers condensing on the cold outside wall.

    0
    0
  • condenseis also a small amount of water vapor that respires from plants and evaporates to join other water molecules in condensing into clouds.

    0
    0
  • condensew boilers must have an efficiency rating of A or B, and at the moment only condensing boilers achieve this.

    0
    0
  • cysteine thiol of the Condensing Enzyme domain.

    0
    0
  • With high-density PCM thermal storage technology, it may be possible for a condensing fireless steam locomotive to be developed for extended operating range.

    0
    0
  • By condensing the exhaust steam a vacuum is created in the low pressure cylinder, thus increasing the power.

    0
    0
  • Acetate is subsequently transferred to a cysteine thiol of the Condensing Enzyme domain.

    0
    0
  • vapour of the tests involved pure water vapor whilst others examined the effects of injection of carbon dioxide and air into the condensing vapor.

    0
    0
  • It may be synthesized by condensing sodium acetoacetate with monochloracetic ester, the acetosuccinic ester produced being then hydrolysed with dilute hydrochloric acid (M.

    0
    0
  • The pyrimidines may be obtained by condensing I.

    0
    0
  • This steam condensing adds to the water in the pipe and naturally causes an overflow, which is led back to the boiler and re-used.

    0
    0
  • The more complex phenazines, such as the naphthophenazines, naphthazines and naphthotolazines, may be prepared by condensing ortho-diamines with ortho-quinones (0.

    0
    0
  • The mono-amino derivatives or eurhodines are obtained when the arylmonamines are condensed with orthoamino zo compounds; by condensing quinone dichlorimide or para-nitrosodimethyl aniline with monamines containing a free para position, or by oxidizing ortho-hydroxydiaminodiphenylamines (R.

    0
    0
  • Brahma is conceived as the eternal selfexistent being, which on its material side unfolds itself to the world by gradually condensing itself to material objects through the gradations of ether, fire, water, earth and the elements.

    0
    0
  • Gmelin availed himself of every publication he could, but he perhaps found his richest booty in the labours of Latham, neatly condensing his English descriptions into Latin diagnoses, and bestowing on them binomial names.

    0
    0
  • In order to separate the distillate into various fractions, and to remove as much of it as possible free from condensed steam, it is now usual to employ condensing appliances of special form with outlets for running off the different fractions.

    0
    0
  • 7-trihydroxyxanthone, is found in the form of its methyl ether (gentisin) in gentian root; it is obtained synthetically by condensing phloroglucin with hydroquinone carboxylic acid.

    0
    0
  • Xanthene, C13H100, may be synthesized by condensing phenol with ortho-cresol in the presence of aluminium chloride.

    0
    0
  • Its tetramethyl-diamino derivative, which is formed by condensing formaldehyde with dimethyl-meta-aminophenol and subsequent elimination of water from the resulting diphenyl methane derivative, is the leuco base of pyronine, into which it passes by oxidation.

    0
    0
  • CH :CH (OH), formed by acting on formic ester with acetone in the presence of sodium ethylate, readily yields [1.3.51-triacetylbenzene, C 6 H 3 (CO CH 3) 3; oxymethylene acetic ester or formyl acetic ester or ß-oxyacrylic ester, (HO)CH :CH CO 2 C 2 H 51 formed by condensing acetic ester with formic ester, and also its dimolecular condensation product, coumalic acid, readily yields esters of [1.3.

    0
    0
  • Saturated steam is steam in contact with liquid water at a temperature which is the boiling point of the water and condensing point of the steam; superheated steam is steam out of contact with water heated above this temperature.

    0
    0
  • OXIMES, in organic chemistry, compounds containing the grouping > C: N OH, derived from aldehydes and ketones by condensing them with hydroxylamine.

    0
    0
  • It can be prepared by distilling a mixture of dry calcium benzoate and acetate, Ca(O2CC6H5)2 + (CH3CO2)2Ca = 2CaCO3 + 2 C6H5CO.CH3, or by condensing benzene with acetyl chloride in the presence of anhydrous aluminium chloride (C. Friedel and J.

    0
    0
  • Acetonyl-acetophenone, C6H5.CO.CH2.CH2.CO.CH3, is produced by condensing phenacyl bromide with sodium acetoacetate with subsequent elimination of carbon dioxide, and on dehydration gives aa-phenyl-methyl-furfurane.

    0
    0
  • Oxazoles are produced on condensing phenacyl bromide with acid-amides (M.

    0
    0
  • Paal has also obtained pyrrol derivatives by condensing acetophenone-acetoacetic-ester with substances of the type NH2R.

    0
    0
  • They are prepared by condensing thio-amides with a-haloid ketones or aldehydes, the thio-amide reacting as the tautomeric thio-imino acid.

    0
    0
  • Dihydrothiazoles, or thiazolines, are obtained by condensing ethylene dibromides with thio-amides; by the action of a-haloid alkylamines on thio-amides (S.

    0
    0
  • The benzothiazoles are a series of weak bases formed by condensing carboxylic acids with ortho-aminothiophenols (A.

    0
    0
  • We may evaporate some of the solvent from the solution which has become weaker and thus reconcentrate it, condensing the vapour on the solution which had become stronger.

    0
    0
  • Darzens (Comptes Rendus, 1904, 139, p. 1214) prepares esters of disubstituted glycidic acids, by condensing the corresponding ketone with monochloracetic ester, in the presence of sodium ethylate.

    0
    0
  • Such a plate has the power of a condensing lens, and gives an illumination out of all proportion to what could be obtained without it.

    0
    0
  • The diketotetrahydrotriazoles, or urazoles, are formed by condensing urea derivatives with hydrazine salts, urazole itself resulting by the action of urea or biuret on hydrazine or its salts.

    0
    0
  • The osotriazoles are obtained by heating the osazones of orthodiketones with mineral acids; by the action of acetic anhydride on the hydrazoximes of orthodiketones, or by condensing diazo-methane with cyanogen derivatives (A.

    0
    0
  • Busch (Ber., 1905, 38, pp. 856, 4049) has isolated a series of bridged ring compounds which he describes as endo-iminodihydrotriazoles, the triphenyl derivative (annexed formula) being prepared by condensing triphenylaminoguanidine with formic acid.

    0
    0
  • Formic acid yields acridine, and the higher homologues give derivatives substituted at the meso carbon atom, N N +[[Hcooh-C 6 H 5 /Inc6h5->C6h4 C6h4 Cho Ch N N +Ch 3 000h->C 6 H 5 /IC 6 H 5 --C 6 H 4 C6h4 Coch 3 C]](CH3) Acridine may also 1:e obtained by passing the vapour of phenylortho-toluidine through a red-hot tube (C. Graebe, Ber., 1884, 17, p. 1 37 0); by condensing diphenylamine with chloroform, in presence of aluminium chloride (0.

    0
    0
  • Koerner (Ber., 1884, 17, p. 203) by condensing ortho-nitrobenzaldehyde with aniline, the resulting ortho-nitro-para-diamino-triphenylmethane being reduced to the corresponding orthoamino compound, which on oxidation yields chrysaniline.

    0
    0
  • Taurke (Ber., 1905, 38, p. 1663) by condensing silicon halides with alkyl chlorides in the presence of sodium: SiC14-1-4R Cl+8Na= SiR 4 +8NaCI; SiHC1 3 +3R.

    0
    0
  • Triethyl silicol, (C2H5),Si OH, is a true alcohol, obtained by condensing zinc ethyl with silicic ester, the resulting substance of composition, (C2H5)3 SiOC2H51 with acetyl chloride yielding a chloro-compound (C2H5)3SiC1, which with aqueous ammonia yields the alcohol.

    0
    0
  • The ketone, dihydroxyacetone, CH 2 OH CO CH 2 OH, was obtained by Piloty by condensing formaldehyde with nitromethane, reducing to a hydroxylamino compound, which is oxidized to the oxime of dihydroxyacetone; the ketone is liberated by oxidation with bromine water: 3H CHO + CH 3 NO 2 -- (CH 2 OH) 3 C NO 2 - (CH 2 OH) 3 C NH OH -- (CH 2 OH) 2 C: NOH - > (CH20H)2CO.

    0
    0
  • It also results on condensing acetylene, and on reducing phenylacetylene by zinc dust and acetic acid.

    0
    0
  • Those substituted in the benzene nucleus are obtained by condensing two molecules of a substituted benzyl and benzal chlorides.

    0
    0
  • It is extremely hygroscopic and is 'used in synthetical organic chemistry as a condensing agent.

    0
    0
  • It is formed by the condensation of acetylene tetrabromide with benzene in the presence of aluminium chloride: Br CH Br CH C H +C6H6=4HBr+C6H4) I, )C6H4, Br CH Br CH and similarly from methylene dibromide and benzene, and also when benzyl chloride is heated with aluminium chloride to 200° C. By condensing ortho-brombenzyl bromide with sodium, C. L.

    0
    0
  • Of these the Etudes sur la condition de la classe agricole et l'Nat de l'agriculture en Normandie au moyen dge (1851), condensing an enormous mass of facts drawn from the local archives, was reprinted in 1905 without change, and remains authoritative.

    0
    0
  • The condensing apparatus must also be conditioned by the volatility.

    0
    0
  • For more efficient condensation - and also for shortening the apparatus - the central tube may be flattened, bent into a succession of V's, or twisted into a spiral form, the object in each case being to increase the condensing surface.

    0
    0
  • The condensing water enters at the top and is conducted to the bottom of the inner tube, which it fills and then flows over the outside of the outer tube; it collects in the bottom funnel and is then led off.

    0
    0
  • A more general designation is "pyrogenic processes," which also includes such operations as leading vapours through red-hot tubes and condensing the products.

    0
    0
  • The details of the plant - the material and fittings of the still, the manner of heating, the form of the condensing plant, receivers, &c. - have to be determined for each substance to be distilled in order to work with the maximum economy.

    0
    0
  • The condensing plant varies with the volatility of the distillate.

    0
    0
  • When the vapours readily condense to a solid form the condensing plant may take the form of large chambers; such conditions prevail in the manufacture of arsenic, sulphur and lampblack: in the latter case (which, however, is not properly one of distillation) the chamber is hung with sheets on which the pigment collects.

    0
    0
  • The more volatile vapours pass over to the condensing plant, while the less volatile ones condense in the bulbs and are returned to the column at varying heights by means of connecting tubes.

    0
    0
  • The body of the still is made of copper, with a head and worm, or condensing apparatus, either of copper or tin.

    0
    0
  • the Weir, the condensing water circulates upwards through the tubes; in others, e.g.

    0
    0
  • in the "Lusitania," the steam traverses vertical copper coils tinned inside and outside; the coils are crescent-shaped, a form which gives a greater condensing surface and makes the coils self-scaling.

    0
    0
  • Bamberger, Ber., 1888, 21, p. 1901) and is frequently used as a condensing agent.

    0
    0
  • Steam at high pressure exhausting into the atmosphere is still commonly used, but the great power required for raising heavy loads from deep pits at high speeds has brought the question of fuel economy into prominence, and more economical types of the two-cylinder tandem compound class with high initial steam pressure, superheating and condensing, have come in to some extent where the amount of work to be done is sufficient to justify their high initial cost.

    0
    0
  • In many mints the flues pass into condensing chambers where volatilized gold and silver are recovered.

    0
    0
  • This range acts as a " breakwater " to the clouds, arresting and condensing the moisture which is carried northwards by the south winds.

    0
    0
  • Those of the former type are obtained by condensing a-bromketones with primary amines (A.

    0
    0
  • Sodamide was introduced by Claisen (Ber., 1905, 3 8, p. 6 93) as a condensing agent in organic chemistry, and has since been applied in many directions.

    0
    0
  • It is purified by redistilling and condensing directly under paraffin.

    0
    0
  • The flux is moistened with water and exposed to a current of carbonic acid, which, on account of the condensing action of the charcoal, is absorbed with great avidity.

    0
    0
  • Zincke found that the products obtained by coupling a diazonium salt with a-naphthol, and by condensing phenylhydrazine with a-naphthoquinone, were identical; whilst Meldola acetylated the azophenols, and split the acetyl products by reduction in acid solution, but obtained no satisfactory results.

    0
    0
  • Meta-oxyazobenzene, C 6 H 5 N: N(1)C 6 H 4 OH(3), was obtained in 1903 by P. Jacobson (Ber., 1903, 36, p. 4 0 93) by condensing ortho-anisidine with diazo benzene, the resulting compound being then diazotized and reduced by alcohol to benzene-azometa-anisole, from which meta-oxyazobenzene was obtained by hydrolysis with aluminium chloride.

    0
    0
  • When the slit is narrow light is lost through diffraction unless the angular aperture of this condensing lens, as viewed from the slit, is considerably greater than that of the collimator lens.

    0
    0
  • In order to record line spectra it is by no means necessary that the receiving instrument (bolometer or radiometer) should be linear in shape, for the separation of adjacent lines may be obtained if the linear receiver be replaced by a narrow slit in a screen placed at the focus of the condensing lens.

    0
    0
  • H 3 C CO NH 3 CO CH 3 H3C C - NH - C CH3 On nitration it yields chiefly meta-nitro-benzaldehyde, crystallizing in needles which melt at 58° C. The ortho-compound may be obtained by oxidizing ortho-nitrocinnamic acid with alkaline potassium permanganate in the presence of benzene; or from ortho - nitrobenzyl chloride by condensing it with aniline, oxidizing the product so obtained to ortho-nitrobenzylidine aniline, and then hydrolysing this compound with an acid (Farben fabrik d.

    0
    0
  • Various modifications have been made in the form of the condensing apparatus, the Guttmann condenser (Jour.

    0
    0
  • This consists of a series of vertical earthenware condensing tubes through which compressed air is passed in order to reduce the quantity of nitrogen peroxide to a minimum.

    0
    0
  • Jour., 1860, 158, p. 146); by heating aniline for red with nitrobenzene, concentrated hydrochloric acid and iron (Coupier, Ber., 1873, 6, p. 423); or by condensing formaldehyde with aniline and ortho-toluidine and oxidizing the mixture.

    0
    0
  • Acetyl acetone, CH 3 CO CH 2 CO CH 3, may be prepared by the action of aluminium chloride on acetyl chloride, or by condensing ethyl acetate with acetone in the presence of sodium (L.

    0
    0
  • Acetonyl acetone, CH 3 CO CH 2 CH 2 CO -CH a liquid boiling at 194° C., may be obtained by condensing sodium aceto-acetate with mono-chloracetone (C. Paal, Ber., 1885, 18, p. 59), CH3000H2C1+Na CH [[Coch3(Coor) ->Ch3co Ch2 Ch 000h,(Coor) -Ch3co]] CH2 CH2 000H3; or by the hydrolysis of diaceto-succinic ester, prepared by the action of iodine on sodium aceto-acetate (L.

    0
    0
  • Claisen by condensing ethoxymethylene aceto-acetic esters and similar compounds with /3-ketonic esters and with 1.3 diketones.

    0
    0
  • The ethoxymethylene aceto-acetic esters are prepared by condensing aceto-acetic ester with ortho-formic ester in the presence of acetic anhydride (German patents 77354, 79087, 79863).

    0
    0
  • Bernthsen); by the action of ammonium chloride or hydrochlorides of amines on nitriles; by condensing amines and amides in presence of phosphorus trichloride; by the action of hydrochloric acid on acid-amides (0.

    0
    0
  • Parabanic acid (oxalyl urea), C0[NH C0] 21 is formed by oxidizing uric acid; or by condensing oxalic acid and urea in the presence of phosphorus oxychloride.

    0
    0
  • Barbituric acid (malonyl urea), CH2[C0 NH]C0.2H20, formed by condensing malonic acid with urea (E.

    0
    0
  • 1888 [6], 14, p. 44 1); by the action of carbon dioxide on monobrombenzene in the presence of sodium; by condensing benzene And carbonyl chloride in presence of aluminium chloride, the benzoyl chloride formed being subsequently hydrolysed; and similarly from benzene and chlorformamide: C6H6 +Cl Conh 2 = Hc1 -C6h,CONH2, the benzamide being then hydrolysed.

    0
    0
  • For a proper utilization of the condensed acid it is nearly always imperative that it should be as strong as possible, and this forms a second important consideration in the construction of the condensing apparatus.

    0
    0
  • The gaseous mixture, issuing from the latter, is washed with water in the usual condensing apparatus, to remove the 40 or 50 parts of hydrochloric acid left unchanged, and can then be immediately employed for the manufacture of chlorate of potash.

    0
    0
  • Lagodzinski (Berichte, 1895, 28, p. 1427) has synthesized alizarin by condensing hemipinic acid [(CH30)2C6H2(COOH)2] with benzene in the presence of aluminium chloride.

    0
    0
  • It is obtained by condensing benzal chloride with mercury diphenyl (Kekule and Franchimont, Ber., 1872, 5, p. 907); from benzal chloride or benzotrichloride and zinc dust or aluminium chloride; from chloroform or carbon tetrachloride and benzene in the presence of aluminium chloride; and deamidating diand tri-aminotriphenylmethane with nitrous acid and alcohol (0.

    0
    0
  • It does not seem probable, however, that they can escape the fate of ultimately condensing into one confused mass.

    0
    0
  • Thus in the first stage of a star's history we find it gradually condensing from a highly diffused gaseous state, and growing hotter as it does so.

    0
    0
  • When evolution to that which is taking place in double stars; the latter appear to be separating from a single original mass and the former condensing into one.

    0
    0
  • The specific heat of steam was determined shortly afterwards by Regnault (Comptes Rendus, 36, p. 676) by condensing superheated steam at two different temperatures (about 125° and 225° C.) successively in the same calorimeter at atmospheric pressure, and taking the difference of the total heats observed.

    0
    0
  • When employing a Volta condensing electroscope, the following is the method of procedure: - The top of the electroscope consists of a flat, smooth plate of lacquered brass on which another plate of brass rests, separated from it by three minute fragments of glass or shellac, or a film of shellac varnish.

    0
    0
  • 749) they are the custodians of the gates of Olympus, which they open or shut by scattering or condensing the clouds; that is, they are weather goddesses, who send down or withhold the fertilizing dews and rain.

    0
    0
  • In the case of conductors of the first class he proved by the use of the condensing electroscope, aided probably by some form of multiplier or doubler, that a difference of potential (see Electrostatics) was created by the mere contact of two such conductors, one of them being positively electrified and the other negatively.

    0
    0
  • Volta then proved that all metals could be arranged in an electromotive 1 Modern researches have shown that the loss of charge is in fact dependent upon the ionization of the air, and that, provided the atmospheric moisture is prevented from condensing on the insulating supports, water vapour in the air does not per se bestow on it conductance for electricity.

    0
    0
  • They are obtained by condensing a halogen derivatives of ketones with acid-amides (M.

    0
    0
  • An ordinary formula for obtaining it is 1 S for highpressure engines, and S for condensing engines, where D is the diameter of the piston in inches and S the length of the stroke in feet, though varying numbers are used for the divisor.

    0
    0
  • The useful residue, known as the "actual," "effective" or "brake" horse-power, can be directly measured by a dynamometer; it amounts to about 80% of the indicated horse-power for good condensing engines and about 85% for non-condensing engines, or perhaps a little more when the engines are of the largest sizes.

    0
    0
  • Fischer has used it as a condensing agent in the preparation of aand 0-acrose from acrolein dibromide.

    0
    0
  • The idea that this film of bacteria oxidizes the alcohol beneath by merely condensing atmospheric oxygen in its interstices, after the manner of spongy platinum, has long been given up; but the explanation of the action as an incomplete combustion, depending on the peculiar respiration of these organisms - much as in the case of nitrifying and sulphur bacteria - is not clear, though the discovery that the acetic bacteria will not only oxidize alcohol to acetic acid, but further oxidize the latter to CO 2 and 01-1 2 supports the view that the alcohol is absorbed by the organism and employed as its respirable substance.

    0
    0
  • It may be prepared by distilling calcium benzoate; by condensing benzene with benzoyl chloride in the presence of anhydrous aluminium chloride; by the action of mercury diphenyl on benzoyl chloride, or by oxidizing diphenylmethane with chromic acid.

    0
    0
  • Soc., 1895, 17, p. 187) manufactures it by passing the vapour of acetic acid through a rotating iron cylinder containing a mixture of pumice and precipitated barium carbonate, and kept at a temperature of from 500° C. to 600° C. The mixed vapours of acetone, acetic acid and water are then led through a condensing apparatus so that the acetic acid and water are first condensed, and then the acetone is condensed in a second vessel.

    0
    0
  • Ruhemann prepared y-substituted dioxypyridines by condensing alkyl-dicarboxy-glutaconic esters with ammonia.

    0
    0
  • Hantzsch (Ber., 1886, 19, p. 31) by condensing methyl iodide and potassium nicotinate at 150° C. the resulting iodide being then decomposed by moist silver oxide.

    0
    0
  • The carbon disulphide and salicylic aldehyde products have also been used as means of distinction, as has also the formation of the stilbazonium bases obtained by condensing ortho-semidines with benzil (0.

    0
    0
  • The temperature is now raised to a white heat, and the product led by malleable iron pipes into condensing troughs containing water, when it condenses.

    0
    0
  • It may be conveniently prepared by passing a rapid current of air over burning phosphorus contained in a combustion tube, and condensing the product in a metal condenser, from which it may be removed by heating the condenser to 50 0 -60° (Thorpe and Tutton, Jour.

    0
    0
  • condensing power of gravitation at the sun's borders is the pressure of radiation.

    0
    0
  • The confines of the sun are visibly in a state of turmoil, for which a sufficient cause can be assigned in the relative readiness with which the outer portions part with heat to space, and so condensing produce a state of static instability, so that the outer surface of the sun in place of being fixed is continually circulating, portions at high temperatures rising rapidly from the depths to positions where they will part rapidly with their heat, and then, whether perceived or not, descending again.

    0
    0
  • Quinaldine (a-methylquinoline) is present in coal-tar; it may be prepared by condensing aniline with paraldehyde and concentrated hydrochloric acid (0.

    0
    0
  • Quinaldine may also be obtained by condensing ortho-aminobenzaldehyde with acetone in presence of caustic soda (P. Friedlander, loc. cit.).

    0
    0
  • It is a colourless liquid which boils at 247° C. The -CH 3 group is very reactive, condensing readily with aldehydes and with phthalic anhydride.

    0
    0
  • It may be prepared synthetically by condensing ortho-aminoacetophenone with paraldehyde and caustic soda (L.

    0
    0
  • It may also be prepared by condensing ay-dimethylquinoline and formaldehyde, the resulting a-ethanollepidine, C9H5 CH3N(CH2 CH2.OH), breaks down on heating and forms lepidine (W.

    0
    0
  • Originally prepared by heating alum, green vitriol and other sulphates, and condensing the products of distillation, sulphuric acid, or at least an impure substance containing more or less sulphur trioxide dissolved in water, received considerable attention at the hands of the alchemists.

    0
    0
  • We also note the Faure and Kessler apparatus, which consists of a platinum pan, surmounted by a double-walled leaden hood, in such a manner that, while the hood is constantly cooled from the outside by water, the thin acid condensing on its inside is carried away without being allowed to flow back into the pan.

    0
    0
  • wished to remedy this condition of affairs, and gave to his penitentionary, the Dominican Raymond of Pennaforte, the task of condensing the five compilations in use into a single collection, freed from useless and redundant documents.

    0
    0
  • The esters of the acids may also be obtained by condensing sodio-malonic ester with a-halogen derivatives of unsaturated acids: CH H?

    0
    0
  • Wislicenus, Ann., 18 93, 2 75, p. 312), is also obtained by the action of sodium on the esters of pimelic acid; by the distillation of calcium succinate; and by hydrolysis of the cyclopentanone carboxylic acid, obtained by condensing adipic and oxalic esters in the presence of sodium ethylate.

    0
    0
  • C 6 H 7 0, is obtained by condensing sodium aceto-acetate with methylene iodide, the ester so formed being then hydrolysed.

    0
    0
  • Buchner (Ber., 1898, 31, p. 2242) they may be represented as follows: The a-acid (a-isophenylacetic acid) is obtained by the hydrolysis of pseudophenylacetamide, formed by condensing diazoacetic ester with benzene, the resulting pseudophenyl acetic ester being then left in contact with strong ammonia for a long time.

    0
    0
  • The operation of efficient condensing is not by any means as simple as might be supposed.

    0
    0
  • (a) Condensing the tar in the ordinary way, and afterwards using the whole or portions of it for cracking into a permanent gas.

    0
    0
  • The national spirit, vaporized into a cosmopolitan mist, was fast condensing again under mortification and insult from abroad uncompensated by any appreciable percentage of cash profit.

    0
    0
  • By condensing arsenic vapour in a glass tube, in a current of an indifferent gas, such as hydrogen, amorphous arsenic is obtained, the deposit on the portion of the tube nearest to the source of heat being crystalline, that farther along (at a temperature of about C.) being a black amorphous solid, while still farther along the tube a grey deposit is formed.

    0
    0
  • It is obtained commercially by roasting arsenical pyrites in either a Brunton's or Oxland's rotatory calciner, the crude product being collected in suitable condensing chambers, and afterwards refined by resublimation, usually in reverberatory furnaces, the foreign matter being deposited in a long flue leading to the condensing chambers.

    0
    0
  • In the amorphous condition it can be obtained by condensing the vapour of the oxide at as high a temperature as possible, when a vitreous mass is produced, which melts at 200° C., has a specific gravity of 3.68-3.798, and is more soluble in water than the crystalline variety.

    0
    0
  • Uvitic acid, 5-methyl isopthalic acid, is obtained by oxidizing mesitylene or by condensing pyroracemic acid with baryta water.

    0
    0
  • Since, however, only relatively low powers are now employed, the ordinary rack and pinion movement for focusing suffices, and for the illuminating the object only a mirror below the stage is required when the object is transparent, and a condensing lens above the stage when opaque.

    0
    0
  • The solution of the extracted oil or fat is then transferred to a steam-heated still, where the solvent is driven off and recovered by condensing the vapours in a cooling coil, to be used again.

    0
    0
  • On the other hand, a great advantage is gained in the absorption machine by using the direct heat of the steam, without first converting it into mechanical work, for in this way its latent heat of vaporization can be utilized by condensing the steam in the coils and letting it escape in the form of water.

    0
    0
  • Some of the tests involved pure water vapor whilst others examined the effects of injection of carbon dioxide and air into the condensing vapor.

    0
    0
  • Moisture in the air can cause damage to a property by condensing against windows and walls, forming mold and causing wood to rot; it can generally form unpleasant living conditions.

    0
    0
  • Glidden has simplified this process by condensing their color palette to 282 hues selected by a panel of color experts.

    0
    0
  • Xanthene, C13H100, may be synthesized by condensing phenol with ortho-cresol in the presence of aluminium chloride.

    0
    1
  • OXIMES, in organic chemistry, compounds containing the grouping > C: N OH, derived from aldehydes and ketones by condensing them with hydroxylamine.

    0
    1
  • Acetonyl-acetophenone, C6H5.CO.CH2.CH2.CO.CH3, is produced by condensing phenacyl bromide with sodium acetoacetate with subsequent elimination of carbon dioxide, and on dehydration gives aa-phenyl-methyl-furfurane.

    0
    1
  • Of these the Etudes sur la condition de la classe agricole et l'Nat de l'agriculture en Normandie au moyen dge (1851), condensing an enormous mass of facts drawn from the local archives, was reprinted in 1905 without change, and remains authoritative.

    0
    1
  • The condensing apparatus must also be conditioned by the volatility.

    0
    1
  • For more efficient condensation - and also for shortening the apparatus - the central tube may be flattened, bent into a succession of V's, or twisted into a spiral form, the object in each case being to increase the condensing surface.

    0
    1
  • The condensing water enters at the top and is conducted to the bottom of the inner tube, which it fills and then flows over the outside of the outer tube; it collects in the bottom funnel and is then led off.

    0
    1
  • The details of the plant - the material and fittings of the still, the manner of heating, the form of the condensing plant, receivers, &c. - have to be determined for each substance to be distilled in order to work with the maximum economy.

    0
    1
  • The condensing plant varies with the volatility of the distillate.

    0
    1
  • When the vapours readily condense to a solid form the condensing plant may take the form of large chambers; such conditions prevail in the manufacture of arsenic, sulphur and lampblack: in the latter case (which, however, is not properly one of distillation) the chamber is hung with sheets on which the pigment collects.

    0
    1
  • The more volatile vapours pass over to the condensing plant, while the less volatile ones condense in the bulbs and are returned to the column at varying heights by means of connecting tubes.

    0
    1
  • The body of the still is made of copper, with a head and worm, or condensing apparatus, either of copper or tin.

    0
    1
  • the Weir, the condensing water circulates upwards through the tubes; in others, e.g.

    0
    1
  • Bamberger, Ber., 1888, 21, p. 1901) and is frequently used as a condensing agent.

    0
    1
  • Steam at high pressure exhausting into the atmosphere is still commonly used, but the great power required for raising heavy loads from deep pits at high speeds has brought the question of fuel economy into prominence, and more economical types of the two-cylinder tandem compound class with high initial steam pressure, superheating and condensing, have come in to some extent where the amount of work to be done is sufficient to justify their high initial cost.

    0
    1
  • In many mints the flues pass into condensing chambers where volatilized gold and silver are recovered.

    0
    1
  • Soc., 18 93, 63, p. 1 355); the latter type result on condensing alkylene diamines with a-diketones.

    0
    1
  • Sodamide was introduced by Claisen (Ber., 1905, 3 8, p. 6 93) as a condensing agent in organic chemistry, and has since been applied in many directions.

    0
    1
  • Lampblack is prepared by burning tar, resin, turpentine and other substances rich in carbon, with a limited supply of air; the products of combustion being conducted into condensing chambers in which cloths are suspended, on which the carbon collects.

    0
    1
  • It is purified by redistilling and condensing directly under paraffin.

    0
    1
  • The flux is moistened with water and exposed to a current of carbonic acid, which, on account of the condensing action of the charcoal, is absorbed with great avidity.

    0
    1
  • Zincke found that the products obtained by coupling a diazonium salt with a-naphthol, and by condensing phenylhydrazine with a-naphthoquinone, were identical; whilst Meldola acetylated the azophenols, and split the acetyl products by reduction in acid solution, but obtained no satisfactory results.

    0
    1
  • Meta-oxyazobenzene, C 6 H 5 N: N(1)C 6 H 4 OH(3), was obtained in 1903 by P. Jacobson (Ber., 1903, 36, p. 4 0 93) by condensing ortho-anisidine with diazo benzene, the resulting compound being then diazotized and reduced by alcohol to benzene-azometa-anisole, from which meta-oxyazobenzene was obtained by hydrolysis with aluminium chloride.

    0
    1
  • When the slit is narrow light is lost through diffraction unless the angular aperture of this condensing lens, as viewed from the slit, is considerably greater than that of the collimator lens.

    0
    1
  • In order to record line spectra it is by no means necessary that the receiving instrument (bolometer or radiometer) should be linear in shape, for the separation of adjacent lines may be obtained if the linear receiver be replaced by a narrow slit in a screen placed at the focus of the condensing lens.

    0
    1
  • At the other end of the collimator there is a condensing lens for bringing the rays into parallelism.

    0
    1
  • Soc., 18 93, 63, p. 1 355); the latter type result on condensing alkylene diamines with a-diketones.

    0
    1
  • Lampblack is prepared by burning tar, resin, turpentine and other substances rich in carbon, with a limited supply of air; the products of combustion being conducted into condensing chambers in which cloths are suspended, on which the carbon collects.

    0
    1
  • At the other end of the collimator there is a condensing lens for bringing the rays into parallelism.

    0
    1
  • This range acts as a " breakwater " to the clouds, arresting and condensing the moisture which is carried northwards by the south winds.

    0
    2
Browse other sentences examples →