HAPPY INDIA 159 



300 days a year. Four feet of rain divided by 2 

 equals 2 feet of water available for power production. 

 Each cubic foot weighs 62j Ib. say 60 Ib. ; each 

 acre has about 43,000 square feet say 40,000 square 

 feet ; each square mile has 640 acres say 600 acres ; 

 fall 1,000 feet. Each horse-power requires 33,000 foot- 

 Ib. of work done in one minute say 30,000 foot-lb. 

 Each year has, say, 300 working days, of, say, 10 hours 

 each, and each hour has 60 minutes. Then the 

 horse-power from 4 feet of rain one-half available, 

 or say 2 feet of rain is shown by the following sum : 

 2 ft. x 60 Ib. x 40,000 sq. ft. x 600 acres x 1,000 ft. 

 fall -f- 30,000 ft.-lb. X 300 days x 10 hours x 60 

 minutes = 533 horse-power. 



This is the gross horse-power, and from this must 

 be deducted loss in friction of water-pipes, loss in 

 water-wheels, loss in electric generators, and loss 

 in transmission to the place where the power is 

 required. So that we may calculate upon getting 

 actual work equivalent, according to length of trans- 

 mission and other circumstances, of from 200 to 

 300 horse-power. If we multiply that by the 

 3,000 miles of mountains 100 miles wide, we get 

 150,000,000 horse-power (gross). But the fall of 

 water is more than 1,000 feet. In many places we 

 might utilise a fall of 10,000 feet. And the rainfall 

 is more than 4 feet in many places. In some parts 

 of the Himalayas it is as much as 30 feet in one year. 

 So that there is a practically unlimited amount of 

 power to be got out of the rainfall and snowfall 

 of the Indian mountains. 



