198 OUTLINES OF NATURAL PHILOSOPHY. 



ged being as the square-roots of the depths multi- 

 plied into the areas of the orifices. 



a. According to some very accurate experiments of 

 BOSSUT, the actual discharge through a hole made 

 in the side or bottom of the vessel, is to the theo- 

 retical as 1 to .6, or nearly as 8 to 5. The theo- 

 retical discharge, when computed, must, therefore, 

 be diminished in this ratio to have the true one. 



?s 



b. If the water issues, not through an aperture in the 

 side or bottom of the vessel, but through a pipe 

 from 1 to 2 inches in length, inserted in the aper- 

 ture, the contraction of the vein is prevented, and 

 the actual discharge becomes to the theoretical, as 

 8 to 10, or as 4 to 5. In this way, therefore, the 

 discharge is increased nearly in the ratio of 4 to 

 3. BOSSUT, 523. See also PHONY, Architect. 

 Hyd. 840. ' 



. The theoretical discharge, the discharge through 

 an additional tube, and that through a simple per- 

 foration in the side, are as the numbers 16, 13, and 

 10 nearly. 



289. Water thrown up in a perpendicular jet, 

 ought to ascend to the height of the reservoir ; but 

 on account of the resistance of the air, the fric- 

 tion of the pipe, &c. it always falls short of that 

 height ; and it is found by experiment, that the dif- 

 ferences between the heights of the jets and of the 

 reservoirs, are as the squares of the^heights of the 



jets themselves. 



If 



