Through such arcane studies as the Star Regulus of Antimony, a crystal used in alchemy, and the design of Solomon's temple, White argues, Newton obtained visual analogies to gravity, the mysterious attraction all matter has to other matter.
2.
About 1741 he wrote : " As there are six kinds of metals, so I have also shown with reliable experiments . . . that there are also six kinds of half-metals : a new half-metal, namely Cobalt regulus in addition to Mercury, Bismuth, Zinc, and the reguluses of Antimony and Arsenic ".
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