A modification of the ballistic pendulum was also employed by W.E.
"Encyclopaedia Britannica, 11th Edition, Volume 6, Slice 3" by Various
Swing of ballistic pendulum, 2.35 inches.
"The New Gresham Encyclopedia" by Various
The experiments were made in the usual manner by firing bullets into a ballistic pendulum, and recording the swing of the pendulum.
"Heroes of Science: Physicists" by William Garnett