[ 59 3 



pTojeded horizontally to the very fame diftance upon an hori' 

 zontal plane; but on experiment I found, that. when the fluid 

 fpouted through an orifice of ,08 of an inch diameter, and was 

 kept conflantly at the fame height, the greateft and leafl: diftanccs 

 at which it ftruck the horizontal plane were nearly 15 and 12 

 inches ; but thefe diftances are proportional to the velocities with 

 which they are difchargcd. It follows therefore, that all the 

 particles are not projedled with the fame velocity. It is to be 

 obferved, that the particles which are difcharged with the 

 greatefl: and leaft velocities are few in comparifon of thofe which 

 are difchargcd with intermediate velocities, for while the entire 

 fhower extended from 15 to 12 inches on the horizontal plane, 

 the denfer part was found to occupy only the fpace between 14:!: 

 and I2f inches; fo that the limits of the velocities of the parts 

 of the denfer fhower were as 7 and 6,26; but the limits of the 

 whole were 15 and 12, or as 7 and 5,6; and the limits by theory 

 are as 7 and 5. But we may perceive, that when the fluid 

 fpouts horizontally, the particles which iffue from the upper 

 J3art of the aperture, and which therefore ought to move with 

 the leaft velocity, muft encounter thofe below them moving with 

 a greater velocity, which will encreafe the diflance to which 

 they are projedled on an horizontal plane. Likewife, the particles 

 which iffue from the loweft part of the orifice, and which ought 

 to move with a lefs velocity, than that with which thofe in the 

 axis move, in the ratio of 5 to 7, will have their velocity en- 

 creafed by their being at a greater depth. The Hmit therefore of 

 the ratio of the diftances to which the particles are projeded 

 Vol. VII. * H 2 on 



