12 



APPLIED SCIENCE 



the foot, etc., and that of time usually the minute, it follows 

 that speed is measured in feet per minute, or in corresponding 

 units. 



15. Table of Weights and Measures. The English sys- 

 tem of weights and measures comprises the following tables 

 which are in daily use in the shop, mill, and commercial 

 work of America and England. 



TROY WEIGHT 



24 grains 



20 pennyweights = 

 12 ounces = 



1 penny- 

 weight 

 1 ounce 

 1 pound 



SQUARE MEASURE 

 9 square feet = 1 square yard 

 30 \ square yards = 1 square rod 

 40 square rods = 1 squarerood 



8 square roods = 1 acre 

 640 acres = 1 square mile 



An acre is 208.71 feet square. 



16 drams = 

 16 ounces 

 25 pounds = 

 4 quarters = 

 20 hundreds = 



CUBIC MEASURE 

 1 728 cubic inches = 1 cubic foot 

 27 cubic feet 

 16 cubic feet 



8 cord feet or ) 

 128 cubic feet \ 



= 1 cubic yard 

 = 1 cord foot 



= 1 cord 



LAND MEASURE 

 7.92 inches 1 link 



25 links 1 rod 



4 rods 1 chain 



80 chains 1 mile 



CIRCULAR MEASURE 



