"..people who buy an antique barometer
and the needle does not budge from one day to the next, asume
it must be broken, or stuck ..."
The small square for adjusting timekeeping, found
on many french clocks
Care of case, description , etc.
Chiming clocks described, Westminster Chimes
How to adjust a clock pendulum
Found on Carriage Clocks, Drum and small Mantelpiece
Clocks
Winding up: when and how