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From: Webster's Revised Unabridged Dictionary (1913)

 Mi·cro·cos·mic Mi·cro·cos·mic·al a.  Of or pertaining to the microcosm.
 Microcosmic salt Chem., a white crystalline substance obtained by mixing solutions of sodium phosphate and ammonium phosphate, and also called hydric-sodic-ammonic-phosphate.  It is a powerful flux, and is used as a substitute for borax as a blowpipe reagent in testing for the metallic oxides.  Originally obtained by the alchemists from human urine, and called sal microcosmicum.
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