USEFUL TABLES. 



247 



Twice the diameter of a circle or a square gives four times the area 

 in square feet; twice the diameter of a cube gives eight times the solid 

 contents in cubic feet; half the diameter gives one-fourth of the area, 

 or one-eighth of the cubic contents. 



LEGAL BUSHELS OF VARIOUS ARTICLES IN THE FOLLOWING STATES. 



A ton of Timothy hay, in stack or mow, well pressed, measures 480 

 cubic feet, or 6x8x10 feet. 



