224 V. SIMPLE COMBUSTIBLES— 



covered iron pots, black, easily friable ; used to clarify liquids, 

 but is considerably inferior to bone black, and does not abstract 

 the lime from syrup. 



Russian lamp black, Noir cV Allemagne, Made by burning 

 the chips of resinous deals, made from old fir trees, in tents, to 

 the inside of which it adheres ; mixed with linseed oil, is apt to 

 take fire by itself; used as a paint. 



Burnt lamp black. Lamp black heated in a covered iron 

 pot to get rid of its greasiness : used as a water-colour; fine bone 

 black is sold for it. 



Lamp black, Fuligo lampadum. From distilled oil of bones 

 burnt in lamps, with a long smoking wick : does not take fire with 

 drying oils. 



Wood soot, Fuligo lignL Collected from chimneys, under 

 which wood is burnt for fuel ; contains sulphate of ammonia ; 

 bitter, antispasmodic. 



BisTHE. From wood soot, or peat, by pulverization and 

 washing over ; an excellent brown water-colour, superior to Indian 

 ink for drawings, when they are not intended to be tinted with 

 other colours. 



Cow-dung soot. 261b. yield, by sublimation, 61b. of grey sal 

 ammoniac. 



Soot black. The soot of coal fires, sifted, used as a coarse 

 black colour for making grey mortar. 



SULPHURS. 

 brimstone. 



Native sulphur. Hock sulphur. Prismatic sjdphu?\ Sulphur 

 7iativum, Sulphur vivum citrinum. Found near volcanoes, fine 

 yellow colour, burning away entirely, leaving no fasces ; used by 

 silversmiths. — S. vivum, S. Jiativum griseum. Found near Mount 

 Vesuvius, grey, burns with a blue flame when heated, but the 

 flame soon goes out, earthy ; principally used for the manufacture 

 of brimstone and alum. 



Rough brimstone, Brimstone, S.factitium, S. citrinum. Ob- 

 tained by sublimation or by eliquation from pyrites and the other 

 minerals containing sulphur; yellow ; sold for S. vivum citrinum: 

 from Italy. — S. v. griseum. Grey, impure. 



Roll brimstone, S. in rotulis, S, rotundum. Brimstone, 

 purified by redistillation, and poured into moulds ; from Italy. .^ 



Horse brimstone, Dregs of sulphur vivum, S. caballinum, 

 Sulphuris vivi recrementa. The faeces left in the purification or 

 sublimation of sulphur ; very impure ; used in external applica- 

 jtion to the inferior cattle ; sold for S. vivum griseum. 



