Arithmetic of pharmacy / by A.B. Stevens.

  • Stevens, A. B. (Alviso Burdett), 1853-1940.
Date:
1920
Catalogue details

Licence: In copyright

Credit: Arithmetic of pharmacy / by A.B. Stevens. Source: Wellcome Collection.

    20/120 (page 6)
    10.—If a gallon mixture requires 1 pound, 4 ounces and 6 drams of drug, how many gallons of mixture can be made from 12 lbs. 6 ounces and 6 drams of the drug? 2—TO DETERMINE QUANTITIES USED IN MANUFACTURING 1.—Example,—&OVT many grams of each ingredient are required in the manufacture of 35 grams of Compound Chalk Powder? The U. S. P. gives the following proportions: Prepared Chalk Acacia Sugar To make 100 Gm. 30 Gm. 20 Gm. 50 Gm. The quantity to he made, 35 grams, is 35-100 of 100 grams, the amount of the formula. Hence we must take 35-100 of the amount given for each ingredient, and we have as follows! Prepared chalk 10.5 grams, acacia 7 grams, and sugar 17.5 grams. PROBLEMS How much of each ingredient must be used in the manufacture of the following pharmacopoeial preparations; 2. —To make 120 Compound Cathartic Pills? Ans. Comp. ext. colocynth 9.6 Gm., mild mercurous chloride 7.2 Gm., resin of jalap 2.4 Gm., gamboge 1.8 Gm. 3. To make 300 grams of Comp. Powder of Glycyrrhiza? Ans. Senna 54 Gm., liquorice 70.8 Gm., sulphur 24 Gm., oil of fennel 1.2 Gm., sugar 150 Gm. 4. —To make 1250 mils of Compound Spirit of Orange? 5—To make 4.5 liters of Aromatic Elixir? 6. —If you wish to use 11 grams of mercury in the manufacture of Mass of Mercury, how much of the other constituents must be used ? Proceed as above, except that the quantity of mercury to be used is divided by the quantity of mercury given in the formula. The quantities of the other ingredients are multiplied by this quotient. Ans. Glycyrrhiza 3.33; althaea 5.00; glycerin 3; honey of rose, 11.00; and Oleate of Mercury 0.33 gram. 7. How many grams of opium and sugar of milk must be mixed with 25 grams of ipecac to make Dover’s Powder?