16 drams

equal

1 ounce, oz.

16 ounces

"

1 pound, lb.

28 lbs. (old)

"

1 quarter, qr.

4 quarters (old) 100 lbs., pounds)

"

1 hundred-weight.

20 hundred-weight

"

1 ton.

100 pounds

"

1 cental.

175 troy pounds

"

144 avoirdupois.

1 troy pound

"

5,760 grains.

1 avoirdupois pound

"

7,000 grains.

Avoirdupois weight is used to weigh all coarse articles as hay, meat, fish, potash, groceries, flax, butter, cheese, etc., and metals except precious metals. Formerly, the usual custom was to allow 112 pounds for a hundred-weight and 28 pounds for a quarter, but this practice has very nearly passed away. The Custom-house still continues to use the old usage.

Apothecaries' Measure - Liquid

60 minims or drops, m. equal 1 fluid drachm.

8 fluid drachms

"

1 fluid ounce.

16 fluid ounces

"

1 pint (octarius).

8 pints

"

1 gallon (congius).

These Apothecaries' weights and measures are used by Apotheca. ries and Physicians in compounding medicines, but drugs and medicines are bought and sold by Avoirdupois weight.

Apothecaries' Weight - Dry

20 grains

equal

1 scruple.

3 scruples

"

1 dram.

8 drams

"

1 ounce.

12 onnces

"

1 pound.