Fourcroy The hydrogen of the ammoniac combines with the oxygen of the oxyd and

Fourcroy the hydrogen of the ammoniac combines with

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Fourcroy: The hydrogen of the ammoniac combines with the oxygen of the oxyd, and forms water, whilst the azote being left free escapes in form of gas. The combinations of azote were but lately discovered: Mr Cavendish first observed it in nitrous gas and acid, and Mr Berthollet in ammoniac and the prussic acid. As no evidence of its decomposition has hitherto appeared, we are fully entitled to consider azote as a simple elementary substance. T ABLE of the Binary Combinations of Hydrogen with Simple Substances. Simple Substances. Resulting Compounds. 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 {Hydro­carbonous, or } Not known till lately. {carbono­hydrous radicals(B)} Metallic {Metallic hydrurets(C), as} Hitherto unknown. substances, as {hydruret of iron, &c.} 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.] S ECT . 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 eighty­five hundredth parts of oxygen. This substance, the properties and even existence of which was unknown till [Pg 197] [Pg 198] [Pg 199]
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