Related entry: US Dispensatory: Appendix II. Tables of weights and measures.
Table of Apothecaries' Weights.
| One Grain (Granum) | gr. = a grain. |
| One Scruple (Scrupulus) | ℈ = 20 grains. |
| One Drachm (Drachma) | ʒ = 60 grains. |
| One Ounce Troy (Uncia) | ℥ = 8 drachms. |
| One Pound (Libra) | lb. = 12 Troy ounces. |
Table of Measures of Capacity or Fluids.
| One Minim (Minimum) | ♏︎ = a minim. |
| One Drop (Gutta) | gtt = about ½ minim. |
| One Fluid Drachm (Fluidrachm) | ʒ = 60 minims. |
| One Fluid Ounce (Fluiduncia) | ℥ = 8 fluid drachms. |
| One Pint (Octarius) | O = 16 fluid ounces. |
| One Gallon (Congius) | C = 8 pints. |
Metric System.
| Weights. |
|---|
| One Myriagramme | Equals | 10,000 Grammes |
| One Kilogramme | " | 1,000 Grammes |
| One Hectogramme | " | 100 Grammes |
| One Decagramme | " | 10 Grammes |
| One Gramme (the unit of weight) equals the weight of one cubic centimeter of water at 4° C. |
| One Decigramme | " | 0.1 Gramme |
| One Centigramme | " | 0.01 Gramme |
| One Milligramme | " | 0.001 Gramme |
| Measures of Capacity or Liquids. |
|---|
| One Myrialiter | Equals | 10,000 Liters |
| One Kiloliter | " | 1,000 Liters |
| One Hectoliter | " | 100 Liters |
| One Decaliter | " | 10 Liters |
| One Liter (the unit of measure) equals the volume of one cubic decimeter. |
| One Deciliter | " | 0.1 Liter |
| One Centiliter | " | 0.01 Liter |
| One Milliliter | " | 0.001 Liter |
Metric System with Equivalents.
| Metric Weights | Equivalent. |
|---|
| One Myriagramme | Equals | 22,046 | lbs. Avoirdupois. |
| One Kilogramme | " | 15,432.35 | Grains Troy. |
| One Hectogramme | " | 1,543.235 | " |
| One Decagramme | " | 154.323 | " |
| One Gramme | " | >15.432 | " |
| One Decigramme | " | 1.543 | " |
| One Centigramme | " | 0.154 | " |
| One Milligramme | " | 0.015 | " |
Metric System with Equivalents.
| Metric Measures | Equivalent |
|---|
| One Myrialiter | Equals | 2641.7 | Gallons. |
| One Kiloliter | " | 264.17 | " |
| One Hectoliter | " | 26.417 | " |
| One Decoliter | " | 2.6417 | " |
| One Liter equals 2.113 Pints. | " | 0.264 | " |
| One Deciliter | " | 3.381 | Fluid Ounces. |
| One Centiliter | " | 2.704 | Fluid Drachms. |
| One Milliliter | " | 16.231 | Minims. |
Apothecaries' Weights and Measures, with Metric Equivalents.
| Weights. | Exact Metric Equivalents. |
|---|
| 1 Ounce Avoirdupois (437.5 gr.) | Equals | 28.350 | Grammes. |
| 1 Ounce Troy (480 gr.) | " | 31.103 | " |
| 1 Drachm Troy (60 gr.) | " | 3.888 | " |
| 1 Scruple (20 gr.) | " | >1.296 | " |
| 1 Grain | " | 0.06479 | " |
| 1-10 Grain | " | 0.006479 | " |
| 1-60 Grain | " | 0.001079 | " |
| 1-100 Grain | " | 0.000648 | " |
| 1-200 Grain | " | 0.000324 | " |
| 1-500 Grain | " | 0.000129 | " |
| Measures. | Exact Metric Equivalents. | Approximate Equivalents. |
|---|
| 1 Gallon | Equals | 3.7854 Liters | Equals | 4 Liters. |
| 1 Quart | " | .94636 Liters | " | 1 Liter. |
| 1 Pint | " | 473.180 cu. cent | " | ½ Liter. |
| 8 Fluid Ounces | " | 236.590 cu. cent. | " | ¼ Liter or 240 c.c. |
| 4 Fluid Ounces | " | 118.295 cu. cent. | " | ⅛ Liter or 120 c. c. |
| 1 Fluid Ounce | " | 29.574 cu. cent. | " | 30 cubic Centimeters. |
| 1 Drachm | " | 3.697 cu. cent. | | |
| 1 Minim | " | 0.061 cu. cent. | | |
Since one cubic centimeter of water weighs one gramme, the word "gramme" is often used instead of cubic centimeter for liquid measure.
The Eclectic Practice of Medicine, 1907, was written by Rolla L. Thomas, M. S., M. D.
