They usually take the form of cast iron open stoves fitted with a number of Bunsen burners which heat perforated lumps of asbestos.
In 1849 we find him studying chemistry under Bunsen at Marburg, where his love for astronomy was revived by Gerling's lectures.
Bunsen), it melts at 310-320° C. and boils between 763-772° C. (T.
Mit Bunsen (Leipzig, 1873); Die deutschen Mackie and der Fiirstenbund.
Bunsen held the chair of chemistry.
Bunsen at Marburg in 1840, and by O.
Berzelius was an early worker in this field; he was succeeded by Bunsen, and Deville and Debray, who worked out the separation of rhodium; and at a later date by P. T.
Bunsen and A.
Bunsen, the discoverer of the cacodyl compounds.
At the same time, however, the conception of radicals could not be entirely displaced, for the researches of Liebig and Welder, and those made subsequently by Bunsen, demonstrated beyond all doubt the advantages which would accrue from their correct recognition.
16, p. 382) were afterwards perfected by Robert Wilhelm Bunsen and Gustav Merz.
And of iodine and sulphurous acid to the estimation of copper and many other substances by Robert Wilhelm Bunsen, marks an epoch in the early history of volumetric analysis.
Hold a small portion of the substance moistened with hydrochloric acid on a clean platinum wire in the fusion zone' of the Bunsen burner, and note any colour imparted to the flame.
These reactions are practised in the following manner: A thread of asbestos is moistened and then dipped in the substance to be tested; it is then placed in the luminous point of the Bunsen flame, and a small porcelain basin containing cold water placed immediately over the asbestos.
Beilstein determines their presence by heating the substance with pure copper oxide on a platinum wire in the Bunsen flame; a green coloration is observed if halogens be present.
Before taking up residence in his parish he once more went abroad, and made in Rome the acquaintance of the Chevalier Bunsen, who afterwards dedicated to him part of his work, Hippolytus and his Age.
Bunsen (Ann., 1866, 137, p. I); A.
A long tour in Italy in 1828 was the beginning of his intimacy with Bunsen and did much to develop his knowledge of art and love of antiquity.
In concert with his friend Bunsen he laboured to bring about a rapprochement between the Lutheran and Anglican churches, the first-fruits of which was the establishment of the Jerusalem bishopric under the joint patronage of Great Britain and Prussia; but the only result of his efforts was to precipitate the secession of J.
And Bunsen were edited by Ranke (Leipzig, 18 73); his proclamations, speeches, &c., from the 6th of March 1848 to the 31st of May 1851 have been published (Berlin, 1851); also his correspondence with Bettina von Arnim, Bettina von Arnim and Friedrich Wilhelm IV., ungedruckte Briefe and Aktenstiicke, ed.
Von Bunsen at Marburg, and three years later to Lyon Playfair at London.
From 1847 to 1851 he was engaged at Brunswick in editing the Dictionary of Chemistry started by Liebig, but in the latter year he went to Marburg as successor to Bunsen in the chair of chemistry.
Bunsen, and this process subsequently received much attention at the hands of Moissan and Borchers.
Two years later Bunsen and H.
Strontium salts may be recognized by the characteristic crimson colour they impart to the flame of the Bunsen burner and by the precipitation of the insoluble sulphate.
In April 1833 occurred what is known as the Frankfort Insurrection (Frankfurter Attentat), in which a number of insurgents led by Georg Bunsen attempted to break up the diet.
Bunsen, Berlin Acad.
Bunsen, the best source of rubidium and caesium salts is the residue left after extraction of lithium salts from lepidolite.
Bunsen, Ann., 1862, 122, p. 347; 1863, 125, p. 367).
Before the commercial production of calcium carbide made it one of the most easily obtainable gases, the processes which were most largely adopted for its preparation in laboratories were: - first, the decomposition of ethylene bromide by dropping it slowly into a boiling solution of alcoholic potash, and purifying the evolved gas from the volatile bromethylene by washing it through a second flask containing a boiling solution of alcoholic potash, or by passing it over moderately heated soda lime; and, second, the more ordinarily adopted process of passing the products of incomplete combustion from a Bunsen burner, the flame of which had struck back, through an ammoniacal solution of cuprous chloride, when the red copper acetylide was produced.
Billwiller introduced the idea of sucking air into the flame at or just below the burner tip, and at this juncture the Naphey or Dolan burner was introduced in America, the principle employed being to use two small and widely separated jets instead of the two openings of the union jet burner, and to make each a minute bunsen, the acetylene dragging in from the base of the nipple enough air to surround and protect it while burning from contact with the steatite.
Bunsen may be regarded as the originator of the second method, and it was he who devised the small cone of platinum foil, sometimes replaced by a cone of parchment perforated with pinholes, arranged at the apex of the funnel to serve as a support for the paper, which is apt to burst under the pressure differences.
Bunsen analysed fifteen examples of air collected at the same place at different times, and found the extreme range in the percentage of oxygen to be from 20.97 to 20.84.
At Rome he gained the friendship of Baron (Christian C. J.) von Bunsen, which had a most important influence on his life.
Bunsen (Ann., 1854, 92, p. 248) was more successful when he electrolysed calcium chloride moistened with hydrochloric acid; and A.
Detection and Estimation.-Most calcium compounds, especially when moistened with hydrochloric acid, impart an orange-red colour to a Bunsen flame, which when viewed through green glass appears to be finch-green; this distinguishes it in the presence of strontium, whose crimson coloration is apt to mask the orange-red calcium flame (when viewed through green glass the strontium flame appears to be a very faint yellow).
Bunsen showed that no oxygen was present.
On heating it melts at 95.6° (Bunsen) to a liquid resembling mercury, and boils at 877.5° (Ruff and Johannsen, Ber., 1905, 38, p. 3601), yielding a vapour, colourless in thin layers but a peculiar purple, with a greenish fluorescence, when viewed through thick layers.
Matthiessen, sodium ranks fourth to silver, copper and gold as a conductor of electricity and heat, and according to Bunsen it is the most electropositive metal with the exception of caesium, rubidium and potassium.
Sodium is most distinctly recognized by the yellow coloration which volatile salts impart to a Bunsen flame, or, better, by its emission spectrum which has a line (double), the Fraunhofer D, line, in the yellow (the wave-lengths are 5896 and 5890).
It is used in the manufacture of carbon rods for arc lights, and for the negative element in the Bunsen battery.
Then, by the use of another piece of platinum as anode, mercury is electrolytically deposited upon the platinum, which may also be amalgamated by making it white hot in a Bunsen flame and plunging it in mercury.
It fuses at 62.5°C. (Bunsen) and boils at 667°, emitting an intensely green vapour.
Analysis, &c. - All volatile potassium compounds impart a violet coloration to the Bunsen flame, which is masked, however, if sodium be present.
Von Bunsen and Ernst Platner (1773-1855), to which he contributed several chapters.
It also contains interesting communications from Bunsen and Professor Loebell, and select translations from the Kleine Schriften.
Bunsen by boiling iodine with aqua regia and extracting with ether.
In 1829 he went to Germany, and after studying at Gottingen and Berlin (where he came under the influence of Heeren, Ottfried Muller, Schleiermacher, Neander and Bdckh) he accompanied Bunsen to Italy and Rome.
In the ordinary laboratory the Bunsen flame has become universal, and a number of substances, such as the salts of the alkalis and alkaline earths, show characteristic spectra when suitably placed in it.
Gouy, who forced the air before it entered the Bunsen burner, through a spray produce containing a salt in solution.
By this method even such metals as iron and copper may be made to show some of their characteristic lines in the Bunsen burner.
If a short length of platinum wire be inserted vertically into a lighted Bunsen burner the luminous line may be used as a slit and viewed directly through a prism.
(a) When a sodium salt is placed in a Bunsen burner in sufficient quantity, the yellow lines are widened.
Young, according to which the dark line observed in the centre of each component of the sodium doublet in a Bunsen burner is transparent to a radiation placed behind.
Bunsen first announced their discovery, for according to their view every combination of an element showed the characteristic spectrum of its constituent atoms; it did not matter according to this view whether a salt,' e.g.
Thus one of the most common spectra is that seen at the base of every candle and in every Bunsen burner.
Bunsen, in 1852, electrolysed fused magnesium chloride in a porcelain crucible.
Von Schlegel, the diplomatist Christian Karl von Bunsen, Robert Schumann, Karl Simrock, E.
Aluminium chloride, AlC1 3, was first prepared by Oersted, who heated a mixture of carbon and alumina in a current of chlorine, a method subsequently improved by Wohler, Bunsen, Deville and others.
In 1885 he was chosen to succeed Hans Hubner (1837-1884) in the professorship of chemistry at GÃ¶ttingen, where stereochemical questions especially engaged his attention; and in 1889, on the resignation of his old master, Bunsen, he was appointed to the chair of chemistry in Heidelberg.