| http://www.w3.org/ns/prov#value | - Sticking more closely to Avogadro's theory than Gerhardt did later, and taking advantage of new experimental data on vapor densities, Mr. Gaudin established that atoms are not always the same fraction of the molecules of simple bodies--that is to say, these molecules do not always result from the same number of atoms; while the molecules of oxygen, hydrogen, and other halogens are formed from two
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