126 The HorticulturisV 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. = 1 lb. 5,760 gr. = 1 lb. 5,760 gr. = 1 lb. 



lib. = lyV^ibs. = IxV^lbs. 



or 144 lbs. = 175 lbs. = 175 lbs. 



loz. = xlf oz. = \W oz. 



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



Miscellaneous Tables. 



jV of an inch = a line (American) . 



iV of an inch =- a line (French) . 



3 inches = a palm. 



4 inches == a hand. 



9 inches = a span. 



IS inches = a cubit. 



2X feet . . • = a military pace. 



3 feet = a pace. 



A wino gaUon — 231 cubic inches. 



A dry gallon = 268.8 



