144 sq. inches = 1 sq.foot. | 10 sq. chains = 1 acre. 9 sq. feet = 1 sq.yard. | 1 hectare = 2·471 acres. 30¼ sq.yards}= 1 sq.rod |640 acres = 1 sq. mile. 272¼ feet } or pole. | 30 sq. acres = 1 yard of land. 40 rods = 1 sq.rood. |Sq. ins. × 0·007 = {square foot 4 roods } | { nearly. 160 rods } |Sq. yds. × 0·00021= acres nearly. 4840 yards }= 1 acre. |113·0977 sq. ins. = 1 circular foot. 43560 feet } |183·46 circular ins.= 1 square foot. SOLID OR CUBIC MEASURE. 1728 cubic inches = 1 cubic foot. | 27 cubic feet = 1 cubic yard. | 128 cub. ft. = {1 cord 40 cub. ft. of rough, or { | of timber {of wood. 50 cub. ft. of hwn. tmbr.= {1 ton or load.| AVOIRDUPOIS WEIGHT. 16 drachms = 1 ounce. | 20 cwt = 1 ton. 16 ounces = 1 lb. | lbs. × 0·009 = cwt. nearly. 14 lb. = 1 stone. | lbs. × 0·00045 = tons. 28 lb. = 1 qr. cwt. | 7000 grains = 1 lb. avdp. 112 lb. = 1 cwt. | 437½ grains = 1 oz. TROY WEIGHT. 24 grains = 1 dwt. | 5760 grains = 1 lb. troy. 20 dwt. = 1 ounce. | 480 grains = 1 oz. ” 12 oz. = 1 lb. | APOTHECARIES’ FLUID MEASURE. Gallon (C) = 8 pints (O); 1 pint = 20 fluid ounces (oz. weight of water). Ounce (f ℥) = 8 drachms (f ʒ) = 480 minims (♏) = 720 drops (gtt.). One wine glass = 4 tablespoonfuls = 16 tablespoonfuls = 2 ounces. _Symbols._--f. or fl. fluid; s.s. one half; a.a. for each. Thus f℥ss. ½ a fluid ounce. Apothecaries’ weight, formerly used for dispensing medicines, superseded in 1864. 20 grains = 1 scruple; 3 scruples = 1 drachm; 8 drachms = 1 ounce; 12 ounces = 1 lb. (troy). LIQUID MEASURE. Cubic in. nearly. 4 gills = 1 pint = 34¾ 2 pints = 1 quart = 69⅓ 4 quarts = 1 gallon = 277·123 FRENCH WEIGHTS AND MEASURES. WEIGHTS. Gramme 15·432349 grams troy. Décagramme (= 10 grammes) 5·6438 drachms av. Hectogramme(= 100 grammes) 3·527 oz. av. Kilogramme (= 1000 grammes) 2·204621 lbs. av., or 2·679227 lbs. troy. Quintal (= 100 kilogrammes) 220·462 lbs. av. Tonne (= 1000 kilogrammes) 2204·621 lbs. av. Decigramme (= 1/10th of a gramme) 1·5432 grain. Centigramme(= 1/100th of a gramme) 0·15432 grain. Milligramme(= 1/1000th of a gramme ) 0·015432 grain. LINEAL MEASURE.