228 VI. METALS.— SuLPHURETs of. 



hours, strain while hot, and add immediately dilute sulphuric acid 

 to precipitate the sulphur ; wash and dry. 



SriLniuii ANTIM. FUSCUM. Common antimony, subcarb. of 

 potash ana 1 oz. ; melt together, powder, and dissolve in water 

 41b.; let it cool; when cool, add dilute sulphuric acid q. s. to 

 precipitate the remainder of the sulphur, agitate the mixture, that 

 this last precipitate, which is yellow, may be mixed with the other ; 

 wash and dry. Both these are mixtures of kermes mineral with 

 golden sulphur of antimony, and, therefore, to be esteemed inferior 

 to the former : dose, gr. j to v. 



ARSENIC. 



Orpiment, Prismatoldal sulphur^ Sesqidsulphurct of arsenic^ 

 Hiirtall^ Yelloio sulphiiret of arsenic^ Aurijngmentum. Found in 

 mines, yellowish green, with brilliant gold-coloured spangles ; used 

 by painters ; caustic, composed of 4*75 black arsen., with 3 sulph. 

 equiv. 7*75. — Kinrfs yelloio, Hartal. From orpiment, by subli- 

 mation ; from China, Japan, and the Burman empire. 



Yellow arsenic, Yclloiu snlphuret of arsenic, Arsenicum flavum^ 

 A. citrinum. Made of 75 to 901b. white arsenic, rough brimstone 

 101b., by sublimation, or by distilling 1001b. arsenical pyrites with 

 lOlb. of iron pyrites. From Germany. 



Real(;ar, Red arsenic, Chinese vermilion, Mansil, Hemij^ris- 

 r)iatic sulphur. Red snlphuret of arsenic, Resicjallum, Sandaracha 

 Grcecorum, Atiripigmcntnm ruhrum. In mines; fine red colour, 

 like vermilion ; used also by painters ; composed of 2 sulphur 

 and 4-75 of black arsenic, equiv. 6'75. Made into cups, in which 

 the juices of acid fruits being left become cathartic. From Japan 

 and the Burmah dominions. — Manocillei. A coarse red orpiment, 

 sold in Lower India for a paint. 



Red arsenic. Red snlphuret of arsenic, Arsenicum ruhrum 

 factitium. From arsenical and sulphureous pyrites distilled toge- 

 ther, or from powdery white arsenic, S^,- cwt. sublimed with ~ cwt. 

 rough brimstone; the sublimate is afterwards melted and ladled 

 into moulds. From Germany. 



Magnes arsenicalis. Sulphur, white arsenic, and common 

 antimony, of each lib. ; mix by fusion : corrosive. 



iron. 



Iron pyrites, Brass halls, Horse gold, Copperas balls, Hexa- 

 hedral iron pyrites, Bisidphuret of iron. Native sidphuret of iron. 

 Pyrites ferri. Brass yellow, in balls or crystallized ; collected for 

 the manufacture of green vitriol. By exposure to the weather 

 they are decomposed into a sahne powder, from whence the vitriol 



