C 444 1 
the Velocity of a Bullet may be diminiflied in any 
given Ratio , by its being made to impinge on a Body 
of a Weight properly proportioned to it 5 and hereby 
the mod violent Motions, which would otherwife 
efcape our Examination, are eafily determined by 
thefe retarded Motions, which have a given Relation 
to them. Hence then, if a heavy Body greatly ex- 
ceeding the Weight of the Bullet, whofe Velocity is 
wanted, be fufpended fo that it may vibrate freely 
on an Axis in the manner of a Pendulum, and the 
Bullet impinges on it when it is at Reft, the Velocity 
of the Pendulum after the Stroke will be eafily 
known by the Extent of its Vibration, and from 
thence, and the known Relation of the Weight of 
the Bullet and the Pendulum, and the Pofition of 
the Axis of Ofcillation, the Velocity with which 
the Bullet is impinged will be determined, as is 
largely explained in the 8th Propofition. Where 
note, that there is a Paragraph by Miftake omitted 
in that Propofition, which fhould increafe the Velo- 
city there found in the duplicate Proportion of the 
Diftances of the Points of Ofcillation and Percuflion 
from the Axis of Sufpenfion 5 but this only affeds 
that particular Number, for it was remembered in 
the Computations of the fucceeding Experiments, 
the Numbers of which are truly ftated. 
¥ 
It being explained how the Velocities of Bullets 
may be difeovered by Experiment : The next Con- 
deration is, from thofe Velocities to determine the 
Force which produced them. 
And the Author thought, the beft Method of effed- 
ing this was by computing what Velocities would 
arife from the Adion of fired Powder, fuppofing its 
Force 
1 
