MISCELLANEOUS TABLES AND INFORMATION 297 



HANDY EQUIVALENTS 



There are 160 square rods in an acre. 



A square acre is 208.71 feet on a side. 



118 feet is approximately the radius of a circular acre, 

 83 feet of a half acre, and 59 feet of a quarter acre. 



There are 5280 feet in a mile. 



A meter contains 39.37 inches ; a kilometer is .62 mile. 



A liter contains 61 cubic inches, nearly the contents 

 of a quart. 



A hectare contains 2.47 acres. 



A gram weighs 15.432 grains, Troy weight. 



A kilogram or kilo contains 2.2 Ibs avoirdupois. 



There are 231 cubic inches in a U. S. liquid gallon. 



There are 2150.42 cubic inches in a U. S. struck bushel. 



A horsepower is the work done in lifting 33,000 pounds 

 1 foot in 1 minute. A flow of 528 cubic feet of water per 

 minute with 1 foot fall generates one horsepower. 



A miner's inch is the flow of water through an orifice 

 1 inch square under a head (in some States) of 6 inches. 

 In California 50 miner's inches equal 1 cubic foot per 

 second, equal 1.9835 acre feet per day, nearly an inch an 

 hour. In some States 40 miner's inches equal this flow. 



NO. OF PLANTS PER ACRE WITH 

 DIFFERENT SPACING 



