232 GYPSUM FAMILY. cond floetz formations: it also occurs in nests or cotem- poraneous masses in these formations. It is conjectured to have been formed in some instances by the decay of previously existing gypsum beds; in others, it appears to be an original deposite, of cotemporaneous formation with the solid kinds of gypsum. Geographic Situation. It is found in Saxony, Salzburg, and Norway. Use. In some districts, it is used as a manure. Observations. It is distinguished from Agaric Mineral by its colour; rough feel, and its soiling feebly; and from Earthy Heavy - spar, by its inferior specific gravity. Second