In order to produce a note, the succession of shocks must not deviate much from isochronism.
Effects produced when the isochronism of the shocks is not perfect.
The isochronism of a pendulum vibrating in a cycloidal arc was first discovered by Galileo but he did not apply it to clocks.
The experimental verification of this fact led him to the important discovery of the isochronism of the pendulum.
By subsequent experiment he verified the law, and the isochronism of the pendulum was discovered.
An inspection of them will show how little remained to be done when the isochronism of the pendulum was discovered.
The angular velocity is regulated by a Watt's governor, which secures an isochronism of the motion independently of the charge.
Three adjustments are usually made, viz.: for isochronism, temperature and position.
Adjusted to isochronism indicates that the watch functions uniformly during the entire twenty-four hours running.
If the isochronism is but little impaired, we obtain a note corresponding to the mean interval of the shocks.