522 FARM AND SCHOOL PROBLEMS. 



Things to Remember. 



A gallon is 231 cubic inches. 



A bushel is 2,150.4 cubic inches. 



A barrel is 31.5 gallons. 



A foot of lumber is 144 cubic inches. 



A board foot is 12 inches wide, 12 inches long and one inch 

 or less in thickness. 



A cubic foot is (approximately) 9/11 of a bushel. 



A bushel is (approximately) ij cubic feet. 



The circumference of a circle is 3 1/7 times the diameter. 



The area of a circle is (approximately) of the square of 

 the diameter. 



A cubic foot of water weighs 62.5 pounds. 



A cubic foot of milk weighs about 64.37 pounds. 



One gallon of milk weighs about 8.6 pounds. 



A cubic foot of shelled corn weighs about 45 pounds. 



A cubic foot of wheat weighs about 48 pounds. 



A square in roofing is 100 square feet. 



There are 4^ cubic., feet in a barrel. 



A cubic yard of clean sand weighs 2,970 pounds. 



A cubic yard of coarse sand weighs 2,700 pounds. 



Atmospheric pressure is 15 pounds to the square inch at the 

 sea level. 



A crate 10x11x20 inches inside is used for a bushel of 

 potatoes, onions, etc. 



Facts about Corn. 



When corn is planted 3 ft. 6 in. each way, there are the 

 following number of shocks per acre : 



35 shocks when cut 10 hills square. 

 55 shocks when cut 8 hills square. 

 44 shocks when cut 8 by 10 hills. 



The Farmer's Short Methods of Calculation. 



1. To find the cost of articles sold by the hundred, thousand or ton. 



