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A white crystalline salt obtained from human urine.
- ‘A test similar to the borax bead test is often made using microcosmic salt.’
- ‘In addition to his work on constant proportions, Proust isolated crystalline grape sugar and mannite, showed that microcosmic salt contains soda, and isolated leucine from the products of putrefaction of casein.’
- ‘The fluxes used to make beads are borax (available from the drugstore is pure enough for this type of work), salt of phosphorus (also called microcosmic salt), and sodium carbonate (called soda).’
- ‘However Dalton did make some contributions on microcosmic salt and on a new method of analysing sugar.’
- ‘The fluorine in this mineral was not certainly recognized by the blowpipe test, using a flux of microcosmic salt, the well-known etching-power of phosphoric acid itself standing in the way of this.’
Late 18th century: translating Latin sal microcosmicus.
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