CHAPTER IX.

Davy's "Elements of Chemical Philosophy" examined.--His Memoir on some combinations of Phosphorus and Sulphur, &c.--He discovers Hydro-phosphoric gas.--Important Illustrations of the Theory of Definite Proportionals.--Bodies precipitated from water are Hydrats.--His letter to Sir Joseph Banks on a new detonating compound.--He is injured in the eye by its explosion.--His second letter on the subject.--His paper on the Substances produced in different Chemical processes on Fluor Spar.--His work on Agricultural Chemistry 358

Octr. 19{th}

When Potash was introduced into a tube having a platina wire attached to it so & fixed into the tube so as to be a conductor ie. so as to contain just water enough though solid--& inserted over mercury, when the Platina was made neg--No gas was formed & the mercury became oxydated--& a small quantity of the athalyer was produced around the plat: wire as was evident from its gassy alteration by the action of water

--When the mercury was made the neg: gas was developed in great quantities from the pos: wire, & some from the neg mercury & this gas proved to be pure? _oxygene_ Capil Expr.--

proving the decompr of _Potash_

London, Published by Henry Colburn & Richard Bentley 1831

THE LIFE OF SIR HUMPHRY DAVY, BART. &c. &c.