WEIGHTS AND MEASUUES. 38? 



III. WEIGHTS AND MEASURES. 



CUST03IAKY SYSTK3I OF W EIGHTS AND 

 MEASURES. 



I. AVeights. 



A. AVOIRDUPOIS WEIGHT. 



I ton = 2000 pounds (lbs.) ;* 



t lb. s i6 ounces (oz.) = 256 drams = 768 scruples = 7680 grains ; 



I oz. = 16 drams = 48 scruples = 480 grains ; 



I dram = 3 scruples = 30 grains : 



1 scruple = 10 grains. 



B. APOTHECARIES' WEIGHT, FOR DRUGS. 



I lb. = 12 oz, = q6 drams = 288 scruples = 5760 grains; 

 I oz. = 8 drams = 24 scruples = 480 grains; 

 I dram = 3 scruples = 60 grains; 

 I scruple = 20 grains. 



C TROY WEIGHT, FOR JEWELS AND PRECIOUS METALS. 



s lb. = 12 oz. = 24 carats = 240 pennyweight (dwt.) = 5760 grains ; 



X oz. = 2 carats = 20 dwts. = 480 grains ; 



I carat = 10 dwts. = 240 grains; 



I dwt. = ?4 grains. 



II. Measures. 



A. LINEAR. 



S mile = 8 furlongs (frigs.) = 80 chains = r^7.o rods = 5280 feet ;1 

 z furlong = 10 chains = 40 rods = 660 feet; 



I chain = 4 rods = 66 feet; 



I rod = i6i feet; 

 I chain = 100 links ; 



I link = 7.92 inches ; 

 I 3rard = 3 feet = 36 inches; 

 I foot = 12 inches. 



B. SURFACE. 

 I square mile — 640 acres ; 



I acre = 10 square chains = 160 sq. rods = 4840 sq. y^- 

 — 431560 square feet. 



* 1 long ton = 20 imperial hundredweights (cwt ) = 2210 pounds. 

 t 1 sea mile ' .^dmiralty knot) = 6080 feet, or 1.1515 statute mi'e. 



