174 



69. POTASSIUM QUADROXALATE. KHC 2 4 ,H 2 C 2 4 ,2H 2 0. (Tetrox- 



alate of Potassium, Salt of Sorrel, Sal Acetosella, Essential 

 Salt of Lemons.) 

 a. Crystals. 



70. SULPHATE. K 2 S 4 . (Sal Polychrest, Sal de Duobus, Kali 



vitriolatum.) 



a. Crude, obtained from kelp. 

 &. Purified. 

 c. In small crystals. 



Note. For fig. of crystals, see Per. Mat. Med., vol. i., p. 503, figs. 

 78-80. 



71. BISULPHATE.' K H S 4 . (Acid Sulphate of Potassium, Hydric 



Potassic Sulphate.) 



a. Fused. (Sal Enixan.) 



b. In acicular crystals. (Anhydrous Bisulphate of Potash.) 



c. In flattened rhombic crystals. 



Note. Specimen 6 consists of crystals which, if left in their mother- 

 liquor, disappear and give place to crystals like those of specimen c. 

 Fownet, Chemistry, p. 326. 



72. SULPHIDE. (Sulphuret of Potassium, Hepar Sulphuris, Liver oj 



Sulphur.) 



a. Fused. 



b. Ditto, oxidized and deliquesced. 



Note. This substance is not a definite chemical compound, but con- 

 sists in variable proportion of the sulphides with sulphate and thiosul- 

 phate of potassium. See Fownes, Chemistry, p. 327. 



73. MONOSULPHIDE. Kg S. 



a. Crystals. 



Note. This salt is probably not a pure monosulphide. See Fownes, 

 Chemistry, p. 326. 



74. SULPHOCARBOLATE. K C 6 H 5 S 4 . (Sulphophenate of Potassium.) 



a. Crystals. 



75. SULPHOCYANIDE. K Cy S. (Sulphocyanide of Potassium.) 



a. Crystals. 



76. TARTRATE. K 2 C 4 H t 6 . (Neutral Tartar, Soluble Tartar, Kali 



Tartarizatum, Bibasic Tartrate of Potash, Sal Veyetabile.) 



a. Crystals. 



6. Granular powder. 



Note.'FoT fig. of crystal, see Per. Mat. Med., vol. i., p. 549, fig. 89. 



77. "RiTARTRATE. K H C 4 H 4 6 . ( Acid Tartrate of Potash.) 



a. Crystals, impure. (Crude Argol.) 



b. Ditto, recrystallized. (White Argol.) 



c. Powder. (Cream of Tartar.) 



