462 Motion of Fluids through [Book VII. 



ing water, as has been proved by experiments. I fhall 

 firft fpeak of rectilinear pipes. 



In the following experiments two pipes were em- 

 ployed, one of an inch and a quarter diameter, and the 

 other of two inches. The two pipes were fuccefiively 

 lengthened from thirty feet to one hundred and eighty; 

 and the conftant height of the water in the refervoir, 

 above the pipes, was fometimes one foot,- and fome- 

 times two. 



The following table Ihews the refults of thefe expe- 

 riments : 



If, by the aid of the table of additional pipes, which 

 has been before inferted, we fhould wifh to find the 

 quantity of water difcharged by two additional pipes 

 of one inch and one-third and two inches diameter, 

 under the fame height of the refervoir, and without 

 having any regard to friclionj but only to the areas of 



the 



