50 THE SEVEN FOLLIES OF SCIENCE 



which they are made so much heavier; and besides that 

 the fall of this outward water is forcible and violent, 

 whereas the ascent of that within is natural besides all 

 this, there is twice as much water to turn the screw as is 

 carried up by it. 



Fig. 10. 



"But, on the other side, if all the water falling upon one 

 wheel would be able to turn it round, then half of it would 

 serve with two wheels, and the rest may be so disposed of 

 in the fall as to serve unto some other useful, delightful 

 ends. 



