These nitrates generally occur as efflorescences caused by the oxidation of nitrogenous matter in the presence of the alkalies and alkaline earths.
Sodium carbonates are also widely dispersed in nature, forming constituents of many mineral waters, and occurring as principal saline components in natron or trona lakes, as efflorescences in Lower Egypt, Persia and China, and as urao in Mexico, Colombia and Venezuela.
Personal efflorescences provoked by a totality of experiences which differed in each case.
A thick woollen cloth called shayak, coarse cotton chintzes and a kind of soap prepared from the efflorescences of the lake, with dried and salted fish, are also produced.
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