However this may be, it would always be possible, with the aid of a grating of given resolving power, to construct artificially from white light mixtures of slightly different wave-length whose resolution or otherwise would discriminate between powers inferior and superior to the given one.3 2 Compare also F.
The beds are kept artificially moist by the application of water brought from the surface, and the different galleries bear crops in succession.
In 1882, at Reading, a gold medal was given for a cream separator for horse power, whilst a prize of roo guineas offered for the most efficient and most economical method of drying hay or corn crops artificially, either before or after being stacked, was not awarded.
The formula is Fe n, Sn+, where n may vary from 5 to 16; usually it is Fe, S8 or Fe l s S12, the latter being also the composition of the artificially prepared compound.
The ears are usually artificially clipped so as to present a rounded lower margin.
Artificially formed crystals of the various species of mica have been observed in furnace-slags and in silicate fusions.
After the determination of a number of cosmopolitan insects that may well have been artificially introduced, there remains a large proportion of endemic species - sometimes referable to distinct genera - which suggest a high antiquity for the truly insular faunas.
Various alpine plants are found on the Riesengebirge, some of them having been artificially introduced on the Schneekoppe.
It may therefore be said that caoutchouc has been already artificially or synthetically prepared, and the possibility of producing synthetic rubber cheaply on a commercial scale remains the only problem.
The yield of leaf is often much increased, the plants are protected from the weather, and the enhanced value of the crop much more than repays the very considerable expense involved in artificially shading whole fields.
The storing of such tobacco for a lengthened period matures and deprives it of harshness, and the same result may be artificially hastened by macerating the leaves in water acidulated with hydrochloric acid, and washing them out with pure water.
To him, it was no different than artificially inseminating a cow at his clinic... well, the concept wasn't.
The crystalline form appears to be due entirely to the carotin, which can be artificially crystallized from an alcohol or ether solution.
It may be obtained direct from pure and bright coloured portions of the native ore cinnabar, or, artificially, by subliming a mixture of mercury and sulphur.
The one fact which the Lamarckians can produce in their favour is the account of experiments by Brown-Sequard, in which he produced epilepsy in guinea-pigs by section of the large nerves or spinal cord, and in the course of which he was led to believe that in a few rare instances the artificially produced epilepsy and mutilation of the nerves was transmitted.
The salt is obtained from the soil in which it occurs naturally, or from the heaps in which it is formed artificially, by extracting with water, and adding to the solution wood-ashes or potassium carbonate.
"You're a scoundrel and a blackguard, and I don't know what deprives me from the pleasure of smashing your head with this!" said Pierre, expressing himself so artificially because he was talking French.
The most common of these sulphides is cobaltous sulphide, CoS, which occurs naturally as syepoorite, and can be artificially prepared by heating cobaltous oxide with sulphur, or by fusing anhydrous cobalt sulphate with barium sulphide and common salt.
Cadmium sulphide, CdS, occurs naturally as greenockite (q.v.), and can be artificially prepared by passing sulphuretted hydrogen through acid solutions of soluble cadmium salts, when it is precipitated as a pale yellow amorphous solid.
Our artificially-established classifications collapse whilst we gain further insight into the mutual affinities of the existing groups.
Rhombic sulphur may be obtained artificially by slowly crystallizing a solution of sulphur in carbon bisulphide, or, better, by exposing pyridine saturated with sulphuretted hydrogen to atmospheric oxidation (Ahrens, Ber., 1890, 23, p. 2708).
The vegetation is everywhere most scanty, and scarcely anything deserving the name of a tree is to be found unless in the more sheltered spots, and then artificially planted.
Lupine, beans, peas and vetches were grown for fodder, and meadows, often artificially watered, supplied hay.
Improved varieties, obtained by cross-impregnation either naturally or artificially brought about, were carefully propagated and generally adopted, and increased attention was bestowed on the cultivation of the natural grasses.
In Scandinavia a thick turpentine oozes from cracks or fissures in the bark, forming by its congelation a fine yellow resin, known commercially as "spruce rosin," or "frankincense"; it is also procured artificially by cutting off the ends of the lower branches, when it slowly exudes from the extremities.
It must be noted that the processes described by the alchemists of the 13th century are not put forward as being miraculous or supernatural; they rather represent the methods employed by nature, which it is the end of the alchemist's art to reproduce artificially in the laboratory.
At this time there existed a belief, held at a later date by Berzelius, Gmelin and many others, that the formation of organic compounds was conditioned by a so-called vital force; and the difficulty of artificially realizing this action explained the supposed impossibility of synthesizing organic compounds.
Gilgamesh is artificially brought into contact with Ut-Napishtim, to whom he pays a visit for the purpose of learning the secret of immortal life and perpetual youth which he enjoys.
This adventure against Khumbaba belongs to the Eabani stratum of the epic, into which Gilgamesh is artificially introduced.
The two friends by their united force succeed in killing the bull, and then after performing certain votive and purification rites return to Erech, where they are hailed with joy In this adventure it is clearly Eabani who is artificially introduced in order to maintain the association with Gilgamesh.
An authority on precious stones, and especially the diamond, he succeeded in artificially making some minute specimens of the latter gem; and on the discovery of radium he was one of the first to take up the study of its properties, in particular inventing the spinthariscope, an instrument in which the effects of a trace of radium salt are manifested by the phosphorescence produced on a zinc sulphide screen.
It is artificially obtained by adding hydrochloric acid to a solution of lead salt, as a white precipitate, little soluble in cold water, less so in dilute hydrochloric acid, more so in the strong acid, and readily soluble in hot water, from which on cooling, the excess of dissolved salt separates out in silky rhombic needles.
Another oxychloride, PbC1 2.7PbO, known as "Cassel yellow," was prepared by Vauquelin by fusing pure oxide, PbO, with one-tenth of its weight of sal ammoniac. "Turner's yellow" or "patent yellow" is another artificially prepared oxychloride, used as a pigment.
It may be artificially prepared by leading sulphur vapour over lead, by fusing litharge with sulphur, or, as a black precipitate, by passing sulphuretted hydrogen into a solution of a lead salt.
With the disappearance of the Scythae as an ethnic and political entity, the name of Scythia gives place in its original seat to that of Sarmatia, and is artificially applied by geographers, on the one hand, to the Dobrudzha, the lesser Scythia of Strabo, where it remained in official use until Byzantine times; on the other, to the unknown regions of northern Asia, the Eastern Scythia of Strabo, the "Scythia intra et extra Imaum" of Ptolemy; but throughout classical literature Scythia generally meant all regions to the north and north-east of the Black Sea, and a Scythian (Scythes) any barbarian coming from those parts.
With Mahommedan peoples it is sufficient for a woman to cover her face; the Chinese women would think it extremely indecent to show their artificially compressed feet, and it is even improper to mention them to a woman; in Sumatra and Celebes the wild tribes consider the exposure of the knee immodest; in central Asia the finger-tips, and in Samoa the navel are similarly regarded.
Having no spines to their fins, the Gadids used, in Cuvierian days, to be associated with the herrings, Salmonids, pike, &c., in the artificially-conceived order of Malacopterygians, or soft-finned bony fishes.
The whole story is a composite product, and it is possible that some of the stories are artificially attached to the central figure.
A rapid in the Tagus, artificially converted into a weir, renders irrigation easy, and has thus created an oasis in the midst of the barren plateau of New Castile.
Robertson has shown that the typhoid bacillus can grow very easily in certain soils, can persist in soils through the winter months, and when the soil is artificially fed, as may be done by a leaky drain or by access of filthy water from the surface, the microorganism will take on a fresh growth in the warm season.
The most efficient means, however, of improving strong, ill-tasting tobacco is by renewed fermentation artificially induced by moisture and heat.
Wounds may be artificially grouped, under such heads as the following: Burrows and excavations in bark and wood, due te boring insects, especially beetles.
But Israel after the fall of Samaria is artificially excluded from the Judaean horizon, and lies as a foreign land, although Judah itself had suffered from the intrusion of foreigners in the preceding centuries of war and turmoil, and strangers had settled in her midst, had formed part of the royal guard, or had even served as janissaries (§ 15, end).
Artificially prepared crystals of barytes may be obtained by allowing a solution of a soluble barium salt to diffuse slowly into a solution of a soluble sulphate.
The use by the Malays of artificially constructed terms to denote these things may certainly be taken to strengthen the opinion that the Malays arrived in the lands they now inhabit at a comparatively late period in their history, and at a time when they had developed considerably from the original state of primitive man.
Philip's bimetallic system, which had attempted artificially to fix the value of silver in spite of the great depreciation of gold consequent upon the working of the Pangaean mines, was abandoned.
M., artificially irrigated by works completed in 1895.
The transplantation of a piece of living pancreas into the tissues of an animal, thus rendered artificially diabetic, is said to restore it to health.
It is also probable that the English mixed sugar or honey with the wine and thus supplied artificially that sweetness which the English sun denied.
Zinc sulphide, ZnS, occurs in nature as blende (q.v.), and is artificially obtained as a white precipitate by passing sulphuretted hydrogen into a neutral solution of a zinc salt.
Zinc carbonate, ZnCO 3, occurs in nature as the mineral calamine (q.v.), but has never been prepared artificially, basic carbonates, ZnCO 3 .xZn(OH) 2, where x is variable, being obtained by precipitating a solution of the sulphate or chloride with sodium carbonate.
They have been obtained artificially by Hautefeuille by the interaction of titanium fluoride and steam.
This compound occurs in nature as bismuth ochre, and may be prepared artificially by oxidizing the metal at a red heat, or by heating the carbonate, nitrate or hydrate.
Still farther east, the plateaus of the Finisterre ranges are highly cultivated and artificially irrigated by a comparatively fair people.
The great natural advantages it thus enjoyed were artificially increased to an enormous extent by the care of the sovereigns of Egypt.
It has on one side the citadel, erected on an artificially made eminence 45 ft.
The most favoured areas were those where corn and other plants could be artificially produced, and there barbaric cultures were elaborated.
It is a noteworthy fact that whilst pyrites has been prepared artificially, marcasite has not.