"The Principles"

The book can be viewed online.   Here’s a sample passage:

A certain fize is beft for the pallets, or rather a certain proportion between the diameter of the circle de- fcribed by the edge of the pallets and the diameter of the balance-wheel. This was firft fuggefted to Mr. Harrifon from bell-ringing; for he could bring the bell better into a motion, by touching it from time to time fomewhere near the centre than near the circumference; becaufe in the firft cafe his hand moved quick enough to follow the bell.