[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.” [206] Berzelius: _Annales de Chimie_, vol. lxi. [207] _On Transformations produced by Catalytic Bodies_: by Lyon Playfair, Esq.; Phil. Mag., vol. xxxi. p. 191, 1847.--“Facts have been brought forward to show that there is at least as much probability in the view that the catalytic force is merely a modified form of chemical affinity exerted under peculiar conditions, as there is in ascribing it to an unknown power, or to the communication of an intestine motion to the atoms of a complex molecule. Numerous cases have been cited, in which the action results when the assisting or catalytic body is not in a state of change; and attempts have been made to prove, by new experiments, that the catalytic power exercises its peculiar power by acting in the same direction as the body decomposing, or entering into union, but under conditions in which its own affinity cannot always be gratified.” [208] Consult Graham’s Chemistry, _On Combining Proportions_. [209] _Memoir on Atomic Volume and Specific Gravity._ Messrs. Lyon Playfair and Joule.--Philosophical Magazine, vol. xxvii. p. 453, or Transactions of Chemical Society of London. _Observations_ on the above, by Professor de Marignac.--Bibliothèque Universelle, Feb. 1846. _On the Relation of the Volumes of bodies in the solid state, to their equivalents, or atomic weights_: by Professor Otto. _Studies on the connection between the atomic weights, crystalline form, and density of bodies_: by M. Filhol. Translated for the Cavendish Society, and published in their Chemical Reports and Memoirs.