Evening Republican, Volume 21, Number 247, Rensselaer, Jasper County, 2 November 1917 — Important Discovery. [ARTICLE]

Important Discovery.

’Of all liquids, scientists have found that mercury has the greatest specific gravity; but another has recently been discovered which is also so heavy that stones of all kinds—granite, limestone, quartz, etc. —float in it. It Is aqueous solution of tungstoporate. Its specific gravity is 8.3, whereas that of ordinary rocks does not exceed 2.7. Only a few precious stones have a specific gravity greater than that of this liquid, for which reason it is proposed to employ it for the separation of such stones from masses of broken rocks.