INFLAMMABLES. 79. Sulphur, 
23^ 
79. SULPFIUR. Yellow with a lhade of greehi 
hard, brittle, becoming eledric by fridion, inr 
foKible in wafer: melting and becoming liquid 
jn a low heat, burning with a blue flame and 
intollerably fuffocating vapours which difcharge 
mod vegetable colours, in a higher and conti- 
nued heat evaporating in the fonri of vapours : 
combining >vith mod metals. 
Pure, in an upcpiTibined ftate. 
Pyrites nudus. Syli. nat. xii. 5./. 113. «. 
Sulphur natiyuin. Wall.Jyf;. 1 23. ». i, 
Priinllone. Schme'Jer i. p 3PI. Khnvan 2 . p. Sg, 
Native fulphur. ThoTr<Jombem. \.p. 31. p,{>. 
1, In a ftate of powder, or flowers. 
Sulphur pulycrulcntuni. IVftU.ffst. z.p. (25. «. j.e. 
I, Solid and pure. 
Of a coinnion form and op^ke. Wall. fyst. z. p. 124. i. c. 
Pf a cortipion form and diaphanous, li'all.fjji. «. i. b. 
Fibrous or capillary. Wall.ftjt. n. 1, d. 
In the form of cryftals. Wall. Jyfl. ». i. a. 
3. Solid and mixed with arfenic or other materials, of a reddilh 
colour. 
Sulphur arfenicale. Wall.JyJi. 2. p, izj. «. 2. 
Found in a ftate of folution in the numerous fulpbur waters of 
Europe, and fometimes dcpoflted in a ftate of powder in the 
drains through which they run ; in a folid ftate in the mines 
of Sicily and Naples, Sec. contaminated with arfenic in the 
neighbourhood of volcanoes, and cryrtallized in tables, cubes, 
4 fided prii'ms longitudinally and very finely ftriate. Ample J 
or 6-fidcd pyramids, or moft commonly in double 4-fided 
pyramids, in Italy, Spain, Hwmandy, and Siberia t it is ge- 
nerally found in fmall pieces of gypruin, layers of clay, or in 
lime: luftre a little greafy, and caufes double refraftion : it 
does not diflblyc in water, but is foluble in fat oils and alka- 
lies: fpccific gravity 1,999. confifts entirely of fulphqric acid 
and oxygene. 
Weum. Combined with mould or alumina which is left behind after 
deflagration, not producing a difagreeable fmell when, 
acids are porured on it. 
Sulphur coloratum. Wall, fyst, 2. p. 125. n. 3, 
ffir-wan mineral. 2. p. 73. 
Coal blende. Schmeijfer miner, i. p. 303. 
