CUBIC MEASURE 



1666 



CUBIC MEASURE 



(3) A cord of stone will make approximately 

 100 cubic feet of wall. 



(4) Three bushels of lime and one cubic yard 

 of sand will' lay a cord of stone. 



Practical Problems, (a) How many cubic feet 

 are there in a log 40 feet long, 15 inches in diame- 

 ter at one end, and 18 inches at the other? (To 

 find the circumference at each end, use the rule : 

 The circumference of a circle is equal to 3.1416 

 times the diameter.) 



A CORD OF STONE 



. Solution of (a). 15 inches =1% feet. 18 inches 

 = 1% feet. Circumference of log at smaller 

 end = 3 . 1416X1% feet = 3.927 feet. Circumference 

 of log at larger end = 3.1416X 1% feet = 4.7124 

 feet. Average circumference =% (3.927 + 4.7124) 

 feet =4.3 197 feet. Contents of log in cubic feet 

 .4.3197 



= 40X4.3197X- 



-=186.598. 



(b) In stove-wood measure, each stick is 16 

 inches long. How many cords of stove wood 

 could be made from a full-sized cord of wood? 



(c) If the full cord is bought for $3.00 and 

 sawed into stove lengths as in problem (b) and 

 sold for $1.25 a cord, what is the profit? 



Solution of (b) and (c). Since the full-sized 

 cord is 4 feet (48 inches) wide, as many cords 

 of 16-inch wood can be made from it as 48 -=-16, 

 or 3. The stove wood is sold for 3 X $1.25 or 

 $3.75. The profit is therefore $3.75 $3.00 or 

 $.75. 



Measures for Crops. (1) A ton of dry hay is 

 estimated at 500 cubic feet to the ton. To find 

 the number of tons in a mow, multiply the length 

 in feet by the height in feet and then by the width 

 in feet and divide the result by 500. 



(2) To find the number of tons in a stack, mul- 

 tiply the width in feet by the length in feet by % 

 the height and divide by 500. 



(3) To find the contents of a round stack, mul- 

 tiply the distance around the stack in feet by 

 "itself and then multiply by 4 times the height in 

 feet, striking off two places from the right of 

 the result thus obtained. This gives the number 

 of cubic feet in the stack, and by dividing by 

 500, the number of cubic feet occupied by a ton 

 of dry hay, the number of tons is found. If the 



dimensions of the stack are given in yards the 

 same process should be followed, except that at 

 the end the cubic contents of the stack should be 

 divided by 18.5 instead of 500. There are 18.5 

 cubic yards in the space occupied by a ton of hay. 



(4) To find the contents of a crib in bushels of 

 shelled corn, multiply the number of cubic feet 

 in the crib by 8 and strike off the right-hand fig- 

 ure ; that is, divide by 10. This is equivalent to 

 eight-tenths of the number of cubic feet in the 

 crib. One cubic foot of space holds eight-tenths 

 of a bushel of shelled corn. 



(5) To find the number of heaped bushels of 

 ear corn contained in a crib, multiply the number 

 of cubic feet in the crib by 4 and strike off the 

 right-hand figure. This is equivalent to taking 

 four-tenths of the number of cubic feet, and is 

 correct because one cubic foot holds about four- 

 tenths of a bushel of ear corn. 



A CORD OF WOOD 



(6) When the sides of the crib are flared, that 

 is, wider at the top than at the bottom, it is 

 necessary to take the average width in esti- 

 mating. Take one-half the sum of the top and 

 bottom widths as the average. Multiply this fig- 

 ure by the height, and then multiply by the 



A CORN CRIB 



If this structure is eight feet wide at the top 

 of the door and five feet wide at the bottom, the 

 average width is six and one-half feet. 



length. The result will be the cubic area of 

 the crib. Then, to find the number of bushels 

 of ear corn, multiply this result by 4 and strike 

 off the right-hand figure. 



