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Tests for Vinegar

The methods Vinegar. The methods wine vinegar, cold , are mixed with 1½ ounces of testing the strength of vinegar are given bone-charcoal (prepared as directed in the under the head of Acetimetry. The following tests of purity will be found useful: found useful:

Paper written on or smeared with pure vinegar, is not charred when strongly warmed before the fire; if it is, the vinegar contains fully 2 per cent. of sulphuric acid. next receipt) in a glass vessel. Shake this mixture from time to time, and in 2 or 3 days the color completely disappears. When the process is to be performed in the large way, throw the charcoal into a cask of vineinto a cask of vinegar, which must be stirred from time to time.

Dip a small porcelain capsule or china cup The highest colored red wines treated in the into a solution of 1/2 ounce sugar in 15 ounces same manner become perfectly limpid. Ivoryounce sugar in 15 ounces same manner become perfectly limpid. Ivorywater, and then heat the capsule to a tempera- black possesses the same property as bonecapsule to a tempera- black possesses the same property as boneblack. Filtering through charcoal will prodrop of vinegar let black. Filtering through charcoal will proture of 212 Fahr. fall on it will not be materially discolored if duce the same result . pure; it will turn a dark brown or black, if 1752. To Prepare Animal Charcoal the vinegar contains only 300 part of sulphuric to Decolorize Vinegar and other Vege- 360 part of sulphuric to Decolorize Vinegar and other Vegeacid; the presence of 1000 of sulphuric acid table Liquids. Fill a crucible with the of του of sulphuric acid table Liquids.

Fill a crucible with the will cause the spot to turn an olive green a most compact parts of ox and sheep bones, lute the cover, carefully leaving only a small ginger, 4½ drachms; cummin seeds, 18 grains; opening at the top, place the crucible on a black pepper, 54 grains; poppy seed, 94 grains; forge fire, and heat it gradually till red; when garlic, 2 heads; cinnamon, 1 scruple; cardathe flame from the oily and gelatinous parts the flame from the oily and gelatinous parts mom, 5 seeds; 8 cloves, 1 or 2 chillies; half a -nut grated; all but the last to be ground denly raise the fire; when cold, reduce the on a stone. charcoal to fine powder. (See No. 1729.)