Epitome of the Pharmacopeia of the United States and the National Formulary / With Comments

by Albion Walter Hewlett; William August Puckner; Torald Hermann Sollmann; Martin I. Wilbert

20 Grains = 1 scruple (℈).
3 Scruples = 1 drachm (ℨ).
8 Drachms = 1 ounce (℥).
12 Ounces = 1 pound (℔).

APOTHECARIES’ FLUID MEASURE

60 Minims = 1 fluidrachm (flℨ).
8 Fluidrachms = 1 fluidounce (fl℥).
16 Fluidounces = 1 pint (O).

EQUIVALENTS OF APOTHECARIES’ WEIGHT IN METRIC

1 Grain = 0.06479895 Gm.
1 Drachm = 3.8879369 Gm.
1 Ounce = 31.1034956 Gm.
1 Pound = 373.241948 Gm.

EQUIVALENTS OF APOTHECARIES’ FLUID MEASURE IN METRIC

1 Minim = 0.06161 Cc.
1 Fluidrachm = 3.6966 Cc.
1 Fluidounce = 29.573 Cc.
1 Pint = 473.17 Cc.

EQUIVALENTS OF METRIC WEIGHT IN APOTHECARIES’

0.001 Gm. (1 milligram, 1 mg.) = 0.01543 grain.
0.01 Gm. (1 centigram) = 0.15432 grain.
0.1 Gm. (1 decigram) = 1.54324 grains.
1 Gm. (1 gram) = 15.4324 grains.
10 Gm. (1 decagram) = 2 drachms, 34.324 grains.
100 Gm. (1 hectogram) = 3 ounces, 1 drachm, 43.24 grains.
1000 Gm. (1 kilogram, 1 kg.) = 2 pounds, 8 ounces, 52.4 grains.

EQUIVALENTS OF METRIC FLUID MEASURE IN APOTHECARIES’