Chloride or Hypochlorite of Potash

Eau de Javelle. See Liq. PotassAe ChlorinatAe, Pocket Formulary.

Chloeide of Soda, or Chlorinated Soda

See Soda Chlorinata, and Liquor Soda; ChloratAe, in the Pocket Formulary. A more ready way of preparing it, for other purposes than for dispensing prescriptions, is the following: Diffuse 1 lb. of chloride of lime in 30 lbs. of water. Dissolve 2 lbs. of crystallized carbonate of soda in 15 lbs. of water. Mix the solutions, let the mixture settle, pour off the clear liquid, and filter it.

Chlorine

See Gases.

Chlorofoem

See Chloroformum, Pocket Formulary.

Chocolate

See Chocolata, Pocket Formulary.

Chromate of Potash

Mix 4 parts of chrome iron ore (chro-mate of iron) with 2 of pearlash and 1 of nitre, and heat the mixture in a reverberatory furnace for several hours. Lixiviate, and crystallize. The chromate is converted into bichromate, by adding sulphuric acid, or rather acetic acid, to the solution.

Chromate of Lead, See Pigments.

Chromic Oxide

Mix bichromate of potash with half its weight of chloride of ammonium; heat the mixture to redness, and wash the mass with plenty of boiling water. Dry the residue.

Chromic Acid

See Acid, Chromic.

Powder to Keep away Moths from Clothes

Mix powdered pipe-clay 1 1/2 lbs., white pepper and starch, each 1 oz., root of Florentine iris 1 1/2 oz., with spirits of wine 2 oz. To be dusted over the clothes when laid by.

Cochineal Colouring

Macerate best carmine 1 oz. in strong solution of ammonia 6 oz. until it is dissolved. Heat gently to drive off excess of ammonia. Put into a quart wine bottle, and add rectified spirit 4 oz., and white sugar 3 lbs. Fill up with warm water, and shake until the sugar is dissolved. - Mr. Palmer.

Collodion

Mix in a glass, stoneware, or porcelain vessel, 30 parts of strong sulphuric acid and 20 of powdered nitre; place the vessel in cold water: add 1 part of carded cotton-wool, and open and stir it in the acid mixture by means of 2 glass or porcelain rods, or stems of tobacco pipes, for 2 or 3 minutes. Then remove the cotton into a large quantity of cold water, press it, and wash it in a stream of water, opening it with the fingers, till the water passes through it free from acidity. Squeeze it strongly in a dry cloth, and then open it, and dry it gradually in a warm situation, free from danger. One part of this prepared cotton, with 16 of rectified ether, and 1 of alcohol, agitated together, soon forms a gelatinous solution. See Pocket Formulary for its medical preparations.

Elastic (for surgical purposes) Collodion

Mix together in a stoneware or porcelain pot, sulphuric acid (of sp. gr. 1.817) 300 parts, very dry nitrate of potash 200 parts; and add carded cotton 10 parts. Leave in contact for 12 minutes; withdraw the cotton, wash it in cold water to remove the acid which it contains, and, after 2 or 3 rinsings, immerse it again in a solution of 30 parts of carbonate of potash in 1000 of water; plunge it again into simple water, agitating well; and lastly, dry it at a temperature of 77° to 86° Fahr. The product is xyloidin. Place now 8 parts of this xyloidin, with 125 parts of sulphuric ether in a wide-mouthed flask, and add 8 parts of alcohol