| Denomination. | Weight in grains in terms of the Imperial Standard Pound which contains 7000 such grains. | |
| Ounces. | 10 ounces. | 4800 |
| 8 ounces | 3840 | |
| 6 ounces | 2880 | |
| 4 ounces | 1920 | |
| 2 ounces | 960 | |
| 1 ounce | 480 | |
| Drachms. or half an ounce | 4 drachms | 240 |
| 2 drachms | 120 | |
| 1 drachm | 60 | |
| Scruples. | 2 scruples | 40 |
| 11⁄2 scruples or half a drachm | 30 | |
| 1 scruple | 20 | |
| half a scruple | 10 | |
| 6 grains | 6 | |
| 5 grains | 5 | |
| 4 grains | 4 | |
| 3 grains | 3 | |
| 2 grains | 2 | |
| 1 grain | 1 | |
| half a grain | 0·5 | |
2. Apothecaries’ Measure.
| Denomination. | Containing the following weight, of distilled water. Temperature = 62° Fahr. Barometer = 30 inches. Imperial Pound = 7000 gr. |
| A fluid ounce and the multiples thereof from 1 to 40 fluid ounces. Half a fluid ounce | One fluid ounce contains 437·5 grains weight, or 1⁄160 imperial gallon. |
| A fluid drachm and the multiples thereof from 1 to 16 fluid drachms. Half a fluid drachm | One fluid drachm equals 1⁄8 fluid ounce. |
| A minim and the multiples thereof from 1 to 60 minims. | One minim equals 1⁄60 fluid drachm. |
The imperial standard for determining the weight of the imperial standard pound is of platinum, the form being that of a cylinder nearly 1·35 inch in height and 1·15 inch in diameter, with a groove or channel round it, whose middle is about 0·34 inch below the top of the cylinder, for insertion of the points of the ivory fork by which it is to be lifted; the edges are carefully rounded off, and such standard pound is marked, P.S. 1844, 1 lb.
The following new and additional denominations of standards of apothecaries’ weights and measures, were created under the Weights and Measures Act, by an Order in Council, dated the 14th August, 1879.[269]
[269] Published in the ‘London Gazette,’ August, 15th, 1879.
THIRD SCHEDULE.
Part I.—Metric Equivalents.
Table of the values of the principal denominations of measures and weights on the metric system, expressed by means of denominations of imperial measures and weights, and of the values of the principal denominations of measures and weights of the imperial system, expressed by means of metric weights and measures.
Measures of Length.