APPENDIX 537 



FAMILIAR FACTS 



To find circumference of a circle multiply diameter by 3.1416. 



To find diameter of a circle multiply circumference by .31831. 



To find area of a circle multiply square of diameter by .7854. 



To find area of a triangle multiply base by one-half perpendicular height. 



To find surface of a ball multiply square of diameter by 3.1416. 



To find solidity of a sphere multiply cube of diameter by .5236. 



What is an " equal square "? Is not its " diameter " the same as a side? 



To find cubic inches in a ball multiply cube of diameter by .5236. 



Doubling the diameter of a pipe increases its capacity four times. 



A gallon of water (U. S. standard) weighs 8 pounds | ounce, and contains 

 231 cubic inches. 



A cubic foot of water contains 1\ gallons, 1728 cubic inches, and weighs 

 62 pounds. 



To find the pressure in pounds per square inch of a column of water multiply 

 the height of the column in feet by .434. 



Steam rising from water at its boiling point (212 degrees) has a pressure 

 equal to the atmosphere (14.7 pounds to the square inch). 



WEIGHT OF EVERYDAY THINGS 



A barrel of flour weighs 196 pounds 



A barrel of salt weighs 280 pounds 



A barrel of beef weighs 200 pounds 



A barrel of pork weighs 200 pounds 



A barrel of fish weighs 200 pounds 



A keg of powder equals 25 pounds 



A stone of lead or iron equals 14 pounds 



A pig of lead or iron equals : 21 stone 



Anthracite coal, broken cubic foot averages 54 pounds 



A ton loose occupies 40-43 cubic feet 



Bituminous coal, broken foot averages 49 pounds 



A ton loose occupies 40-48 cubic feet 



Cement hydraulic Rosedale, weight per bushel 70 Ibs. 



Cement hydraulic Louisville, weight per bushel 62 pounds 



Cement hydraulic Portland, weight per bushel 96 pounds 



Gypsum, ground, weight per bushel 70 pounds 



Lime, loose, weight per bushel 70 pounds 



Lime, well shaken, weight per bushel 80 pounds 



Sand at 98 pounds per cubic foot per bushel 122 pounds 



18.29 bushels equal a ton. 1.181 tons, cubic yard. 



