99 
SULPHUR. 
Sulphur is found in nature in combination with many other 
dements, and also uncombined, as native sulphur. 
Sulphur may be produced by the decomposition of iron 
Pyrites or other sulphur minerals, but at present, practically 
the world’s supply is obtained from deposits of native sulphur. 
PREPARATION. 
The deposits of sulphur contain many impurities from which 
the sulphur must be extracted. This is accomplished in several 
w ays. The “ore” may be heated to a temperature at which 
the sulphur will melt and drain from the gangue, or if a somewhat 
a'gher temperature is used the sulphur is volatilized and may be 
recovered by condensation. The former method is that usually 
ern pl°yed. The sulphur thus prepared is called brimstone, 
0r if cast into cylindrical sticks, roll sulphur. When the second 
Method is employed the sulphur is obtained in a fine powder, 
called flowers of sulphur, or sublimed sulphur. 
Another method of extracting the sulphur is to dissolve 
. ° ut of the gangue by means of carbon disulphide, from which 
1 m ay be recovered by distilling off the solvent. 
fn some cases the sulphur is won from deep deposits by 
tln g it with high pressure steam and forcing the molten 
0 ? p kur to the surface through bore holes. The sulphur thus 
fained is said to be almost pure. 
USES. 
Sulphur is used in Canada principally in the manufacturing 
Su lphite pulp from wood. 1 
^ ^clphuric acid is made by burning sulphur and converting 
sulphur dioxide to sulphur trioxide, which unites with water 
0r ming the acid- 2 
Sulphur is used to a considerable extent in the manufacture 
gOoci Uni,OWder ’ matc h es > pharmaceutical preparations, rubber 
tan and lns ulated electric cables, and to a lesser extent in 
atlt i n ' ng ’ bleaching of cotton goods, glue making, sugar refining, 
bleaching evaporated apples. 
1 S’* uS $ S v l;te. page 70. 
uses of Pyrite, page 70. 
Of