284 



APPENDIX. 



DISCHARGE OF WATER THROUGH PIPES. 



Table showing the amount of water discharged per minute through 

 an orifice one inch in diameter ; also throui^h a tube one inch in diame- 

 ter and two inches long, according to experiment. To ascertain the 

 amount in gallons, divide the cubic inches by 231. 



Height of head Amount discharged Amount discharged 



of water. through Orifice. through Tube. 



1 Paris foot* 2,722 cub. in. 3,539 cub. in. 



2 " 3,846 " 5,002 



3 " 4,710 " 6, 6 



4 " 5,436 " 7,070 



5 *' 6,075 " 7,900 



6 " 6,654 " 8,654 



7 " 7,183 " 9,340 " 



8 " 7,672 " 9,975 



9 " 8,135 " 10,579 



10 " 8,574 " 11,151 



11 " 8,990 " 11,693 " 



12 " 9,384 " 12,0 5 



13 " 9,764 " 12,699 " 



14 " 10,130 " 13,177 " 



15 " 10,472 " 13,620 " 



VELOCITY OF WATER IN PIPES. 



The following table shows the height of a head of water required to 

 overcome the friction in horizontal pipes 100 feet long, and to produce a 

 certain veloeitj', according to Smeaton : 

 Bweof 



* A Paris foot is about 12 4-5 U. S. inches, and 15 Paris feet are about 

 16 U. S. feet. 



