( 344 ) 
Since no lefs than a Colmnn 9 Times higher, is found, 
by Experience, necelTary to make the feveral Particles 
of Water iiVue out with 3 Degrees of Velocity. So 
that, in thefe Two Inftances, it feems to be certain, 
that the Forces communicated, are as the Squares of the 
Velocities. And that it is fo univerfally, is argued thus : 
The PrefTures are as the Altitudes, and the Altitudes as 
the Squares of the Velocities of every (ingle Particle ^ 
therefore the PrefTures are as the Squares of the Velo- 
cities but the PrefTures are the CauTes of the Forces, 
with which the feveral Particles of Water ifTue out, or 
inovej and therefore (ince Effedls are proportional to 
their Caufes, the Forces with which the feveral Parti- 
cles i(Tue out, and move, are as the Squares of the Ve- 
locities. 
Remark I. The Fault committed in this Reafon- 
ing, and which quite runs through it, is the miftaking 
a Part of the EfTed for the Whole. The entire EfFed 
of any of thefe PrefTures is, not barely a certain Num- 
ber of Degrees of Velocity, in any (ingle Particle, but 
certain Degrees of Velocity in a certain Number of Par- 
ticles, and that certain Number of Particles, in a given 
Time, is, confeffedly, as the Degrees of Velocity. 
Remark II. And this leads me to a Second Re- 
mark, which is, That the entire Eifed of thefe PrefTures 
being taken into Confideration, feems to overturn this 
new Rule in Mechanicks for computing the Forces 
of moving Bodies, which is. That the Forces are as 
the §luantities of Matter multiplied by the Squares 
of the Velocities. And this I (hall endeavour to make 
out thus : The Gentlemen who advance this new Rule,, 
at the fame Time that they affert the Velocities, in the 
Cafes of the Experiment above-mentioned, to be as the 
Square 
