Measures of Approximation
Description
This section is from the book "A Manual of Materia Medica and Pharmacology", by David M. R. Culbreth. Also available from Amazon: Manual of Materia Medica and Pharmacology.
Measures of Approximation
While these equivalents are not precisely accurate, their values have so long been recognized by laymen on the one hand, and physicians on the other, that they will possibly always be thus accepted:
A drop............................................................................................................ | ej .... | .06 | Ml. | (Cc.) |
A teaspoonful................................................................................................... | f3j ... | 4 | Ml. | (Cc.) |
A dessertspoonful................................ | f3ij ... | 8 | Ml. | (Cc.) |
A tablespoonful................................. | f3iv ... | 15 | Ml. | (Cc.) |
A wineglassful................................. | f℥ij ... | 60 | Ml. | (Cc.) |
A teacupful....................................................................................................... | f℥iv ... | 120 | Ml. | (Cc.) |
A tumblerful.................................... | f℥viij-xj | 240-325 | Ml. | (Cc.) |
A breakfastcupful............................... | f ℥ viij . . | 240 | Ml. | (Cc.) |
Another likely source of error in weights and measures arises from quantities purchased in original containers from the manufacturers. Thus we speak of drachm vials of morphine sulphate, which in point of fact contain only one-eighth of 437.5 gr. - indeed, all solids when thus purchased have per ounce only the 437.5 gr., yet per pound sixteen times this amount, or 7,000 gr. With liquids the result is often much more misleading, especially of those having low or high specific gravities. These are sold mostly originally by weight, which causes the bulk often to be at variance with what some might expect.
1 | lb... | 473 | Gm. | Sulphuric Acid.................... | f℥ | 8 1/3 ... | 250 | Ml. | (Cc.) |
1 | lb... | 473 | Gm. | Liquor Ferri Subsulphatis............................................ | f℥ | 10 ... | 296 | Ml. | (Cc.) |
1 | lb... | 473 | Gm. | Chloroform....................... | f℥ | 10 1/3 .. | 305 | Ml. | (Cc.) |
1 | lb... | 473 | Gm. | Syrup Simple..................... | f℥ | 11 3/4 | 350 | Ml. | (Cc.) |
1 | lb... | 473 | Gm. | Glycerin....................................................................... | f℥ | 12 1/4 | 360 | Ml. | (Cc.) |
1 | lb... | 473 | Gm. | Liquor Plumbi Subacetatis.......... | f℥ | 12 7/8 .. | 380 | Ml. | (Cc.) |
1 | lb... | 473 | Gm. | Aqua Ammoniae (10 p. c.).......... | f℥ | 16 ... | 473 | Ml. | (Cc.) |
1 | lb... | 473 | Gm. | " " (28 p.c) ............................................. | f℥ | 17 ... | 503 | Ml. | (Cc.) |
1 | lb... | 473 | Gm. | Spiritus AEtheris Nitrosi ........... | f℥ | 18 1/4 | 540 | Ml. | (Cc.) |
1 | lb... | 473 | Gm. | Essential Oil.............................................................. | f℥ | 13-18 | 385-532 | Ml. | (Cc.) |
1 | lb... | 473 | Gm. | AEther............................ | f℥ | 21 1/6 .. | 625 | Ml. | (Cc.) |
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