A history of chemistry from the earliest times till the present day / by the late James Campbell Brown; with a portrait and one hundred and six illustrations.

James Campbell Brown

Date:: 1913

Credit: A history of chemistry from the earliest times till the present day / by the late James Campbell Brown; with a portrait and one hundred and six illustrations. Source: Wellcome Collection.

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$He also addressed himself to the study of solutions. These he regarded as homogeneous liquid systems of unstable dis- sociating compounds of the solvent with the substance dissolved. He admitted that this was only one of several possible hypo- theses. The laws of the expansion of gases engaged his attention, and he partly forestalled the “ critical temperature ” , of Andrews by his conception of the “ absolute boiling point,” Avhich he defined as that temperature at which a liquid cannot ; exist as a liquid, but forms a gas that cannot pass into the ; liquid state under any pressure whatever, and at which the i cohesion and the latent heat of evaporation are both nothing. In addition to his Principles of Chemistry, Mendeleeff wrote j a book on Naphtha Production in America and the Caucasus \ (1877). For the purpose of ascertaining the facts, he made a* journey to Pennsylvania. He also examined the nitro- compounds with the object of preparing a smokeless powder, for the Russian Government. But it is as a distinguished] student of chemical philosophy, with a marvellous gift of] generalising principles from ascertained facts, and expressing] these as clear and logical propositions, that the name of Dmitri 1 Mendeleeff will take its permanent place in the history of] chemistry. |$