Abstract
Journal of the Russian Chemical and Physical Society, vol. xv. fasc. 1.—Researches on the naphtha of Caucasus, by MM. Beilstein and Kurbatoff. The naphtha from Bakou consists mostly of hydrocarbons of the CnH2n series, identical with the products of hydrogenisation of the aromatic series CnH2n−6, That of the Tzarskiye Kolodtsy has a different composition; it contains but little of the hydrocarbons of the CnH2n series, but chiefly those of the CnH2n+2 types, with a mixture,of those of the aromatic series CnH2n-6. This analysis explains why the petroleum derived from the Bakou naphtha, although having a greater density together with the same volatility, burns brighter than the American, as also the higher qualities of the oils received from this naphtha. Its hydrocarbons being all liquid it contains but little paraffin, and the greasing oils may be cooled to lower temperatures, without liberating paraffin.—On the use of hyposulphite, of ammonium, instead of the sulphide of ammonium, in qualitative analysis, by A. Orlovsky.—On the hydrogenisation of turpentine and cymol, by P. Orloff.—Additions to the theory of the action of chloride of ammonium.—On the evaporation of liquids, by B. Sreznewsky, being the conclusion of a treatise which has appeared in several preceding nmnbers of the Journal. The conclusions arrived at are: the velocity of evaporation is not constant; the velocity of evaporation of drops depends upon their height, and increases as the height diminishes; at a height of an average size it is proportioned to the periphery of the basis.—An aërial calorimeter (a project of), by N. Hesehus.—Elementary demonstration of the pendulum formulæ, by V. Wolkoff.
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Scientific Serials . Nature 28, 21 (1883). https://doi.org/10.1038/028021b0
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DOI: https://doi.org/10.1038/028021b0