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Fluid Extract of Cinchona

Take cinchona (calisaya) in powder, 8 troy ounces; simple (officinal) syrup, 4 fluid ounces; glycerine, 4 fluid ounces; alcohol, concentrated and diluted, a sufficient quantity. Moisten the cinchona with 6 fluid ounces of diluted alcohol; allow it to stand in a covered jar for three hours, and then transfer it to a cylindrical percolator. Pack it firmly, and gradually pour upon it diluted alcohol, until 12 fluid ounces of the tincture have been mix 1 ounce of the essential oil with 1 quart obtained. Set this aside, and continue the of alcohol; although much is sold that conpercolation with dilute alcohol, until the cin- tains only ounce, and even 4 ounce of the chona is thoroughly exhausted. To the last oil to the quart. A strong essence would percolate add the syrup and glycerine, and consist of 1 ounce of oil to 1 pint of alcohol; evaporate by means of a water-bath to about from 10 to 30 drops of this would make a 10 fluid ounces. To this add the reserve dose. tincture, and continue the evaporation to 14 fluid ounces. Remove from the water-bath, and, when nearly cold, add sufficient alcohol to 4609. Το Color Medicinal Essences.

Essence of peppermint is generally colored with tincture of turmeric; essence of cinna- MEDICINAL ESSENCES. mon with tincture of red sandal wood; win- evaporate the liquid to the consistence of tergreen with tincture of kino. The best way thin syrup, adding spice, salt, &c., to suit the of coloring an essence is to steep for 12 hours taste, and pour the essence, while boiling hot, the green leaf or other substance from which into bottles (see next receipt), or jars, or (still the oil is made, and then filter. The coloring is merely a matter of appearance; the essences are just as good without it. better) tin cans, which must be closed up airtight, and kept in a cool place. (See No. 1634.) 4617. To Fill Glass Bottles with