dence of its decomposition has hitherto
appeared, we are fully entitled to consider azote as a simple elementary
substance.

TABLE _of the Binary Combinations of Hydrogen with Simple Substances._

_Simple_ _Resulting Compounds._
_Substances._ _New Nomenclature._ _Old Names._

Caloric Hydrogen gas Inflammable air.
Azote Ammoniac Volatile Alkali.
Oxygen Water Water.

Sulphur {Hydruret of sulphur, or }
{sulphuret of hydrogen } Hitherto unknown (A).
Phosphorus {Hydruret of phosphorus, or }
{phosphuret of hydrogen }

Charcoal {Hydro-carbonous, or } Not known till lately.
{carbono-hydrous radicals(B)}

Metallic {Metallic hydrurets(C), as } Hitherto unknown.
substances, {hydruret of iron, &c. }
as iron, &c. { }

[Note A: These combinations take place in the state of gas, and form,
respectively, sulphurated and phosphorated oxygen gas--A.]

[Note B: This combination of hydrogen with charcoal includes the fixed
and volatile oils, and forms the radicals of a considerable part of the
vegetable and animal oxyds and acids. When it takes place in the state
of gas it forms carbonated hydrogen gas.--A.]

[Note C: None of these combinations are known, and it is probable that
they cannot exist, at least in the usual temperature of the atmosphere,
owing to the great affinity of hydrogen for caloric.--A.]

SECT. VII.--_Observations upon Hydrogen, and its Combinations with
Simple Substances._

Hydrogen, as its name expresses, is one of the constituent elements of
water, of which it forms fifteen hundredth parts by weight, combined
with eighty-five hundredth parts of oxygen. This substance, the
properties and even existence of which was unknown till lately, is very
plentifully distributed in nature, and acts a very considerable part in
the processes of the animal and vegetable kingdoms. As it possesses so
great affinity with caloric as only to exist in the state of gas, it is
consequently impossible to procure it in the concrete or liquid state,
independent of combination.

To procure hydrogen, or rather hydrogen gas, we have only to subject
water to the action of a substance with which oxygen has greater
affinity than it has to hydrogen; by this means the hydrogen is set
free, an