( ) 
been as 64 ; i. e. 4 Times greater than by Experience it 
is found to be. 
Remark III. I cannot but obferve, in the laft 
Place, that the common Rule of eftimating the Forces 
of moving Bodies by the Quantities of Matter multi- 
tiplied by their Velocities, is rather confirmed by thefe 
very Experiments. For then, according to the old 
Maxim, Effeds are proportional to their Caufes, the 
Forces communicated will be as the Forces communi- 
cating, or Preffures. Thus let the Altitude, and con- 
fcquent Prefiure of any Column of Water be 9 Times 
greater than the Altitude of another ^ then the Velocity 
of every fingle Particle of Water prelfed out will be 
triple, and the Number of Particles ifiuing out in a 
given Time will likewife be triple, therefore the Force 
refulting from thefe Two multiplied together, accord- 
ing to the common Rule, will be 9, proportional to the 
PrelTure, as it ought to be. So again, if the Altitude 
be 16 Times greater, the Velocity will be quadruple, 
and the Number of the Particles quadruple, and the 
Force produced the Produd of thefe Two ^ i, e, 16, ftill 
proportional to the iVltitude, or Prefiure. 
And univerfally, the Forces communicated, accord- 
ing to the old Rule, are in a Ratio compounded of Two 
others, One of the Qiiantities of Matter, and the other 
of the Velocities : The Ratio of the Velocities, by the 
Experiments, is the Subduplicate Ratio of the Heights, 
and the Ratio of the Quantities of Matter is, by Con- 
feflion, likewife the Subduplicate of the Heights : There» 
fore the Compound of thefe 2 is the Ratio Integra, or 
fimple Ratio of the Heights ^ in which Ratio are the 
Prelfures themfelves, which produce thefe moving Forces : 
' So that, according to the common Rule, theEffeds are 
always. 
