MEASUREMENT OF HAY. 53 



To find the number of tons of hay in old stacks. 



RULE. Find the area in square yards of the base in the 

 table of the areas of circles on page , or by the rule 

 given 011 page ; then multiply the area of the base by 

 half the altitude of the stack in yards, and divide the pro- 

 duct by 5 ; the quotient will be the number of tons. 



EXAMPLE. How many tons of hay in a circular stack, 

 whose diameter at the base is 8 yards, and height 9 yards ? 



SOLUTION. 50.265, area of base in sq. yards, x 4, half 

 the altitude, =226.192-7-5=45.238 tons. Ans. 



To find the number of tons in long square stack*. 



RULE. Multiply the length in yards by the width in 

 yards, and that by half the altitude in yards, and divide the 

 product by 5 ; the quotient will be the number of tons. 



EXAMPLE. How many tons of hay in a square stack 10 

 yards long, 5 wide, and 9 high ? 



SOLUTION. 10 x 5 x 44=225-7-5=45 tons. Ans. 



