SPECIFIC GRAVITY 37 



6. How many gallons of milk can be put into a can 

 containing 1386 cu. in. ? 



7. How many gallons of water are there in a well 4 ft. 

 in diameter, when the water stands 6 ft. deep ? 



SUGGESTION. For practical purposes, square one half the diameter 

 in feet, multiply by 3|, by the depth in feet, and by 7^. 



8. How many barrels of water are there in the well in 

 problem 7 ? 



9. How many gallons of water are there in a well 6 in. 

 in diameter, when the water stands 10 ft. deep ? 



10. How many gallons of water will a tank 6 ft. in 

 diameter and 2 ft. deep hold ? 



11. How many gallons of water will a barrel contain, the 

 head diameter being 20 in., the bung diameter 24 in., and 

 the length 30 in. ? 



20 in. -f 24 in. 

 SUGGESTION. - - = 22 in., the average diameter. 



12. Measure a cistern and approximate the number of 

 gallons it will contain. 



13. How many gallons will a bucket contain, the head 

 diameter being 10 in., the bottom diameter 9 in., and the 

 depth 10 in. ? 



SPECIFIC GRAVITY 



41. The specific gravity of a substance is its weight 

 measured by the weight of an equal volume of pure water. 



Any substance whose weight is less than the weight of 

 an equal volume of water will float. One cubic foot of 

 water weighs 62.5 Ib. 



42. Weigh a pailful of sand very carefully and subtract 

 the weight of the pail. Then weigh a pailful of water and 



