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. 19th
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