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.