1911 Encyclopædia Britannica/Avoirdupois

AVOIRDUPOIS, or Averdupois (from the French avoir de pois, goods of weight), the name of a system of weights used in Great Britain and America for all commodities except the precious metals, gems and medicines. The foundation of the system is the grain. A cubic inch of water weighs 252·458 grains. Of this grain 7000 now (see Weights and Measures) make a pound avoirdupois. This pound is divided into 16 oz., and these ounces into 16 drachms.

Avoirdupois Weight.

Drachm,	16=ounce,	16=pound,	14=stone,	2=quarter,	4=hundred,	20=ton.
27·3 grains	437·5	7000	98,000	196,000 grs.	112 ℔	2240 ℔.