Equation Clock
A clock invented about the end of the seventeenth century, which contained a device for partially rotating the dial, so as to make the length of the day indicated by the clock, coincide with that of the solar day.
How to true a balance, repair a chipped dial, temper a spring or test a stone — the working bench-book of the American watch trade, arranged A to Z.
A clock invented about the end of the seventeenth century, which contained a device for partially rotating the dial, so as to make the length of the day indicated by the clock, coincide with that of the solar day.