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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 137

An illustration from 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, leaf 137
AND COMPOUNDS OF THESE METALS I I 7 red sandstones, Vosgian sandstones, etc. This oxide also enters into the composition of ochre. … Fig. 41. — Oligistic iron Fig. 40. — Oligistic iron Fig. 42. — Oligistic iron (haematite). (Primi¬ (haematite). (Primi¬ (haematite). (From tive and rhombo- tive basal form. ) the Altenberg mines. ) hedral. ) The sp. gr. is 5*2 to 5*3 ; hardness, 5‘ 5 to 6*5. It is soluble in boiling concentrated…

Alum · Sulphates · Dyes and dyeing · Chemistry, Technical

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