260 Chemical Nomenclature of Berzelius. 
COMBINATIONS OF SULPHUR. 
Phosphorous sulphide.(38) 
Phosphoric sulphide. 
Boric sulphide. Sulphuret of boron. 
Carbonic sulphide. Bisulphuret of carbon. 
Silicic sulphide. Sulphuret of silicium. 
Selenious sulphide.(39) Sulphuret of selenium. 
Subsulphuret of arsenic.(40) 
Hyparsenious sulphide. Protosulphuret of arsenic, (real- 
gar.) 
Arsenious sulphide. Sesquisulphuret of arsenic, (orpi- 
: ment.) 
Arsenic sulphide. Persulphuret of arsenic. 
Persulphuret of arsenic. 
Chromic sulphuret. 
Suschromic sulphide. 
Molybdous sulphuret.(41) 
of cyanogen requires for complete combustion two volumes of oxygen, and yields 
two volumes of carbonic acid and one volume of nitrogen. If one volume of car- 
bonic acid be composed of one volume of vapor of carbon and one volume of oxygen, 
then one volume of cyanogen must contain two volumes of the vapor of carbon and 
one volume of nitrogen. Berzelius adopts, for the composition of carbonic acid, 
one volume of the vapor of carbon and two volumes of oxygen, forming two volumes 
of carbonic acid: that is, he considers the hypothetical vapor of carbon to be twice 
as dense as it is made by the English chemists. This view gives in the two volumes 
of carbonic acid referred to above, as the product of the combustion of one volume 
of cyanogen, but one volume of the vapor of carbon, and makes cyanogen a com- 
pound of equal volumes of the vapor of carbon and of nitrogen, that is, a carburet of 
nitrogen, (carbonic nitruret.)— Trans. 
(38) The sulphides, it will be recollected, are electro-negative compounds of sul- 
phur, playing the part of acids; that is, combining with the sulphurets or electro- 
positive compounds, which answer to the bases.— Trans. 
(39) Obtained by passing sulphuretted hydrogen through selenious acid.— Trans. 
(40) Subsulphuret of arsenic. This compound contains only one twelfth part of the 
sulphur found in the hyparsenious sulphide, while the persulphuret of arsenic con- 
tains nine times as much sulphur as the hyparsenious sulphide. Such a case is not 
specially provided for in the new nomenclature, hence the names subsulphuret of 
arsenic and persulphuret of arsenic.—Trans. 
(41) Berzelius describes three compounds of sulphur with molybdenum, the first 
being a base and the two others electro-negative. These latter are the molybdic 
and hypermolybdic sulphides; the first is the molybdic sulphuret. The proportions 
of sulphur in these compounds being as 2, 3 and 4, renders probable the existence 
of a lower compound, the molybdous suJphuret of the table —Trans. 
