266 Chemical Nomenclature of Berzelius. 
Hydric selenide. ; 
Hydric telluride. (Telluretted hydrogen.) 
With regard to the combinations of hydrogen with nitrogen, phos- 
phorus and carbon, intowhich the hydrogen enters in multiple pro- 
portions, they may be indicated by numbers as; 
Monohydric phosphuret.(59) . ‘ 
Bihydrie phosphuret.. _ Protophosphuretted hydrogen. 
Trihydric phosphuret. Perphosphuretted hydrogen. 
Tetrahydric phosphuret. 
Pentahydric phosphuret. 
Hexahydric phosphuret. 
acid.. But there are circumstances in“opposition to this mode of explanation, and 
which render such an arrangement of the elements improbable. The sulphocyan- 
urets have none of the properties. characteristic of the sulphosalts; they resemble 
rather the haloid salts and oxysalts, combining frequently with the oxide of the metal 
which they contain, forming subsalts. Further, the hydrosulphocyanic acid may 
be obtained from the sulphocyanurets of copper, lead, mercury and silver, by the 
action of hydric sulphide: the metal, in these cases, remains as a sulphobase, which 
would not be the case if it had previously existed as such in these salts.” If the 
French translator has done the author justice in this latter remark, it does not bear 
upon the subject as is supposed; for if the sulphocyanurets be regarded as com- 
pounds of cyanous sulphide and a sulphuret, the hydric sulphide, when added, com- 
bines with the cyanous sulphide, forming hydrosulphocyanic acid, and leaves the 
metal as a sulphobase.— Trans. 
(59) In the names of the following compounds of phosphorus and pees we 
perceive a deviation from the systematic nomenclature. This is rendered necessary 
by the multiple increase of the more electro-positive element. 
Monohydric phosphuret. This compound is hypothetical. It is more particularly 
alluded to in the remarks.upon the next compound. 
Bihydric phosphuret. Davy supposed this gas to contain less phosphorus than the 
spontaneously inflammable phosphuret. The analysis of Rose makes it more rich 
in phosphorus than the latter gas. From a strong solution of hypophosphorous acid, 
he obtained, by heat, a gas varying in composition, but at a mean composeg of three 
volumes of hydrogen and two volumes of the vapor of phosphorus. This gas he 
supposes to be a mixture of two different phosphurets, assumed by Berzelius to be 
the bihydric and a Ene no ane phosphuret; whence the latter named compound 
which heads the list. 
Trihydric phosphuret. The spontaneously inflammable compound of hydrogen 
and phosphorus. The analytical results of Rose are adopted in determining its 
composition and in giving its name. 
Tetrahydric phosphuret. This compound is not formally described, but I infer it 
to be the “ phosphuret of hydrogen,” stated to be formed when the trihydric phos- 
phuret is exposed to light. The precise composition is not known, but simply that 
it contains more hydrogen than the trihydric phosphuret. 
Pentahydric phosphuret. Obtained by Rose, by heating the phosphites of lead 
or tin. 
Hexahydric phosphuret. I have not been able to find any account of this com- 
pound in Berzelius’s work.— Trans. 
