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Camphor Water (Pulverize through a fine sieve)

Pulverize 120 through a fine sieve. Proceed to displace grains camphor in a mortar with 40 minims alcohol; triturate it first with 1/2 troy ounce then poured on, the first part of the filtrate is carbonate of magnesia, then with 2 pints dis- rejected, and the latter portion is kept for use. tilled water, added gradually. Filter through He uses 1/2 ounce tar and 26 ounces of sand to paper. (U. S. Ph.)