FOOTNOTES:
[200] All the phenomena connected with volcanic action, and the theories connected therewith, will be found in Dr. Daubeny’s work, A description of active and extinct Volcanoes, of Earthquakes, and of Thermal Springs. 1848.
[201] Graham’s Elements of Chemistry. New Edition.
[202] Graham’s Elements of Chemistry; and Brande’s Manual.
[203] Of these tables of attraction the following may be taken as a specimen:—
- Sulphuric Acid.
- Baryta.
- Strontia.
- Potassa.
- Soda.
- Lime.
- Magnesia.
- Ammonia.
It thus appears that baryta separates sulphuric acid from its compounds with all inferior substances, and that ammonia is separated from the acid by all that are above it.
[204] Berthollet: Essai de Statique Chimique, 1803. Sir Humphry Davy, in his Elements of Chemical Philosophy, has given an excellent review of the views of Berthollet.
[205] On certain combinations of a new acid, formed of Azote, Sulphur, and Oxygen; by J. Pelouze. Translated from Annales de Chimie, vol. xvi., for Scientific Memoirs, vol. i. p. 470. Some ideas of a new force acting in the combinations of Organic Compounds, by Berzelius: Annales de Chimie, vol. lxi. The conclusion come to by this eminent chemist is expressed in the following translation:—“This new power, hitherto unknown, is common both in organic and inorganic nature. I do not believe that it is a power which is entirely independent of the electro-chemical affinities of the substance. I believe, on the contrary, that it is merely a new form of it; but so long as we do not see their connection and mutual dependence, it will be more convenient to describe it by a separate name. I shall, therefore, call it catalytic power: I shall also call catalysis, the decomposition of bodies by this force—in the same way as the decomposition of bodies by chemical affinity is termed analysis.”