PRESERVATIVE LIQUID.

For a few weeks' preservation of organic objects in their original form,

dimensions, and color, Prof. Grawitz recommends a mixture composed of 2½

ounces of chloride of sodium, 2¾ drachms of saltpeter, and 1 pint of

water, to which is to be added 3 per cent. of boric acid.--_Annales des

Travaux Publics_.

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Scientific American Supplement, No. 601, July 9, 1887 · 第 10 / 40 题