A history of chemistry from earliest times to the present day : being also an introduction to the study of the science / by Ernst von Meyer ; translated with the author's sanction by George M'Gowan.

Date:
1891
Catalogue details

Licence: Public Domain Mark

Credit: A history of chemistry from earliest times to the present day : being also an introduction to the study of the science / by Ernst von Meyer ; translated with the author's sanction by George M'Gowan. Source: Wellcome Collection.

Provider: This material has been provided by the Royal College of Physicians of Edinburgh. The original may be consulted at the Royal College of Physicians of Edinburgh.

    237/588 (page 209)
    This important discovery was reserved for E. lich,^ who explained the occurrence of isomorphoi in substances of difterent nature by proving possessed a similar chemical composition. Thus on examining the salts of phosphoric and arsenic i only those of analogous composition and contain amounts of water of crystallisation were isomorph^ subsequent investigations of selenates and sulphat isomorphism of magnesium and zinc oxides, anc chromium, and aluminium salts, confirmed the connection existing between crystalline form and composition. At first, after making those obs Mitscherlich was of opinion that isomorphism chiefly on the number of the elementary particle molecule), but he soon convinced himself that the nature of these had also to do with it. Berzelius, who regarded the discovery of isomo the most important since the establishment of th( of chemical proportions, endeavoured to arriv atomic weights of the elements by the aid of iso compounds. For, according to him, isomorphis similarity in atomic constitution; chemists only re know the composition of one compound in order 1 that of the remaining isomorphous ones from quantities of the isomorphous elements which rep] ^ Berl. Akad. Ahhandlungen der phys. Klasse, 1818-19, p Ann. Chim. Phys., vol. xiv. p. 172 ; vol. xix. p. 350. ^ Eilhard Mitscherlicli was born in 1794 in Oldenburg, a 1863 at Berlin, where lie worked as Klaprotb's successor in the