A history of chemical theory from the age of Lavoisier to the present time / by AD. Wurtz, translated and edited by Henry Watts.

  • Wurtz, Ad. (Adolphe), 1817-1884.
Date:
1869
Catalogue details

Licence: Public Domain Mark

Credit: A history of chemical theory from the age of Lavoisier to the present time / by AD. Wurtz, translated and edited by Henry Watts. Source: Wellcome Collection.

    98/288 (page 86)
    carbon, tlie hydrogen removed is replaced by an équivalent of c-blorine, bromine, or oxygen. ( 2. At tlie same time there is formed hydro- chloric acid, liydrobromic acid, and water, or nitrous acid, vvliicb are sometimes disengaged, sometiines remain combined in ail tlie new radicals prodnced.’ Tliese two propositions contain tlie germ of a theory which Laurent first enunciated in 1836, and developed in his Inaugural Dissertation, read at tlie Faculté des Sciences de Paris, in 1837 : I mean tlie tlieory of nuclei, which liere deserves a sliort notice, although it lias played but a secondary part in tlie development of modem théories. Here are its principal features. The molécules of organic bodies are either nuclei or compounds of these nuclei with other substances placed witliout them. The nuclei themselves are formed of groupa of car- bon-atoms united with other éléments, each nucléus containing a lixed number of carbon-atoms, united with a determined number of other atoms, grouped around the former according to an invariable order ; and generally the number of carbon-atoms in each nucléus bears a very simple ratio to the number of the other atoms. Nuclei or radicals are of two kinds, fondamental or dérivative. The former contain only carbon and hydrogen. When they are modified by substitution, they constitute derived nuclei or radicals. The ele-