They say you promise to make more human Pendulums than any of your brethren.
"Paul Clifford, Volume 6."
Edward Bulwer-Lytton
Now, in order to decide it by experiment, we must try two Pendulums, one with a small pebble, and the other with a large one.
"Rollo's Experiments"
Jacob Abbott
The pebble stones must be of the same size, this time, for we want the two Pendulums to be alike in all respects, except the length of the string, for that is the circumstance which we are now going to consider.
"Rollo's Experiments"
Jacob Abbott