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Assayer's Gold Weights

The richness or purity of gold is expressed in carats. Pure gold is spoken of as containing 24 carats, of 12 grains each; and any sample containing 12, 18, 22, or any other number of parts of pure gold, in 24 parts, is said to be of so many carats fine. In the process of assaying gold, the real quantity taken is very 3 tb 1 = 12 = 96 = 288 = 57C0 1 3 96 = 8 = = Grs. = Э 24 = 5700 = 480 1 = 3 = CO 1 1 = 20 1 small, generally 6 or 12 grains; and this is 5952. Apothecaries Weight Compared termed the "assay pound." It is nominally subdivided into 24 carats, and each carat into 4 assay grains, and each grain into quarters.

When the assay pound is only 6 grains, the quarter of the assay grain will only weigh the of a grain; hence the most accurate system of weighing must be adopted. with Avoirdupois Weight.

Apothecaries. 1 Pound 1 Ounce 1 Drachm 1 Scruple Avoirdupois.

Oz.

Dr. 5953. Apothecaries Weight Compared figures on the left of the graduated scale dewith Troy Weight. Apothecaries.

Troy. 1 Pound = 1 Ounce 1 1 Drachm 1 Scruple Lb. Oz. Dwt. Gr. 1 0 0 0 2 12 20 = 5954. Value of Apothecaries Weight 20 in Apothecaries Measure.

Weight note ounces, and those on the right, drachms; the first ounce being divided into quarters of 2 drachms each.

No. 2 is a 2-ounce measure, the first halfounce being divided into drachms. Nos. 3 and 4 are 1 ounce and 1 divided into halves; the latter is marked in graduated in drachms, the first of which is drachm measures respectively; the former is graduated in drachms, the first of which is divisions of 5 minims each.