A History of Hindu Chemistry from the Earliest Times to the Middle of the Sixteenth Century A.D. v2.c32.s16.20
A History of Hindu Chemistry from the Earliest Times to the Middle of the Sixteenth Century A.D. v2.c32.s16.20
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v2.c32.s16.20
‡ The ruby and the sapphire are only varieties of corundum, Varāha classes corundum as a species of ruby, the former being dotted over with black and white patches and feeble in lustre [i. e. the non-transparent or coarse kind]. It is scarcely necessary to