AGENTS PROMOTING AVASTE. 67 



phide of calcium. Dose: H. and C, gr. x.-xl. ; D., 



Sulphur, commonly called "brimstone;" sj'mbol, S; 

 atomic weight, 32; quanti valence, 2, 4, and 6; is a 

 non-metallic element, distinguished by its yellow color 

 and crystalline properties. It is one of the acid ele- 

 ments, and unites with to form the most powerful 

 acid radicals. It is almost tasteless, insoluble in cold 

 water or alcohol, but soluble in benzol, carbon bisul- 

 phide, fixed and volatile oils. It is completely vola- 

 tilized by heat, burns with a pale blue flame, and 

 gives off strong suffocating fumes of sulphurous an- 

 hydride while burning. It is found in many animal 

 substances as sulphates, in many mineral waters as 

 hydrogen sulphide, in certain volatile vegetable oils, 

 in the pyrites or metallic sulphides; also as native 

 sulphur in blue clay beds in Sicily and Italy. Sub- 

 limed sulphur is prepared by distilling the crude sul- 

 phur and allowing its vapor to condense as a fine yel- 

 low powder, in large chambers or receptacles built for 

 that purpose. 



Sulphur Lotum, a fine lemon-yellow powder, odor- 

 less and almost tasteless, insoluble in water or alcohol, 

 is prepared by digesting for three days 12 parts of 

 sublimed sulphur with a mixture of water 12 parts, 

 and water of ammonia 1 part. After occasional agi- 

 tation for three days the whole mixture is strained 

 through muslin, and the residue washed with water 

 until the liquid running from the strainer no longer 

 produces a precipitate with test solution of chloride of 

 barium. 



