more dis- their name — or more, perhaps, that of two kid- tinctly visible, owing to the greater difference neys, with their concavities opposed, and their of the refractive power of the water and the surfaces are finely striated, as may be seen in crystals. fig. 3, (from Dr. J. E. Bowman's Medical… … marks being one of the apices of the octohe- If these dumb-bells be kept in any liquid, for dron, (see fig. 1.) When examined with polar- a length of time, they will gradually become ized light, these crystals will be found to have converted into octohedra. Without detailing little or no action…
Medicine · Surgery
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