John Dalton's lectures and lecture illustrations.

  • Gee, W. W. Haldane.
Date:
[1915]
Catalogue details

Licence: In copyright

Credit: John Dalton's lectures and lecture illustrations. Source: Wellcome Collection.

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    of atoms of each of the elements as the modern formulae, had Dalton used double atomic weights for oxygen and carbon. Sheet 23 (reverse side). Plate VII. The atoms C2H2ON are arranged in two different ways to represent albumen and gelatine respectively, and under them is written :— Exp*- Albumen. 53 Carbone 27 Water 20 Ammon. Theory. 44 Carbone 32 Water 24 Ammonia Exp*- Gelatine. 48 Carbone 31 Water 21 Ammon. ioc 100 100 These formulae are truly isomeric. It is also interest¬ ing to note the little respect Dalton shows for the analy¬ tical results, since he is satisfied that there is sufficient accordance between the experimental figures and the calculated ones. The origin of these figures is found by reference to the Laboratory Note-book iv., p 59> which shows Gay Lussac’s analytical figures for albumen and gelatine as nearly the above, viz.:— Albumen. Gelatine. Gay Lussac. Gay Lussac. 1 oxy. 7 23'3 23 9 i oxy. 7 2&1 2J'2 3 carb. i6’2 52-6 5 2'9 2 carb. io'8 43i 47*9 2 hyd. 2 6-6 7’5 2 hyd. 2 8 7 9 1 azote 5 165 I5'7 1 azote 5 2C| i7 30-2 100 TOO ICO TOO or 1 Am. 1 Am. 1 Water. 1 Wat. 3 Carbone. 2 Carb.
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