The Horticulturist' s Rule- Book. 



Troy, or Jewelers' Weight. 



24 grains =1 pennyweight. 



20 pennyweights = 1 ounce. 



12 ounces ==-1 pound. 



lb. 



oz. 



pwt. 



gr. 



1 = 



12 



240 — 



5,760 





1 



= 20 — 



480 







1 — 



24 



Apothecaries' Weight. 



20 grains — 1 scruple. 



3 scruples = 1 dram. 



8 drams = 1 ounce. 



12 ounces = 1 pound. 



lb. oz. dr. scr. gr. 



1 = 12 — 96 — 288 — 5,760 

 1 — • 8 — 24 — 480 

 1=3= 60 

 1 = 20 



Table of Comparative Weights. 



Avoirdupois. Troy. Apothecaries'. 



7,000 gr. — lib. 5,760 gr. =- 1 lb. 5,760 gr. = 1 lb. 



lib. = 1 T V ? lbs. — l^lbs. 



or 144 lbs. = 175 lbs. — 175 lbs. 



loz. = xlf oz. — HI oz. 



or 192 oz. = 175 oz. = 175 oz. 



Miscellaneous Tables. 



j 2 of an inch = a line (American). 



xo of an inch = a line (French) . 



3 inches = a palm. 



4 inches = a hand. 



9 inches . . . . = a span. 



18 inches ..... = a cubit. 



2% feet = a military pace. 



3 feet — a 'pace. 



A wine gallon — 231 cubic inches. 



A dry gallon = 268.8 " 



