The manufacture of alum and the sulphates and other salts of alumina and iron; their uses and applications as mordants in dyeing and calico printing, and their other applications in the arts, manufactures, sanitary engineering, agriculture, and horticulture (1901)
Geschwind, Lucien · London : Scott, Greenwood & son; New York : D. Van Nostrand co. [etc., etc.] · leaf 220
pyritic lignites contain a notable quantity of clay, a high proportion of ferric oxide combined with the organic matter, a little magnesia and chalk, traces of phosphoric acid and potash, and 0*2 to 0*3 per cent, of nitrogen. Constituents. 1 2 3 34-80 22 -6o Water . 40-00 Iron pyrites ....... 23-70… … The colour of the pyritic lignites varies from greenish black to lustrous black. They are more or less compact. In the fresh condition they yield up no sulphates to water, with the exception of a minute quantity of calcium sulphate. They exhibit the same property as the pyritic shales of weathering…
Alum · Sulphates · Dyes and dyeing · Chemistry, Technical
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