Public domain photos

The image shows a black and white drawing of a clock with a pendulum, which is a mechanical device used to measure the time. The text accompanying the drawing provides further details about the device, such as its purpose and how it works.

The image shows a black and white drawing of a clock with a pendulum, which is a mechanical device used to measure the time. The text accompanying the drawing provides further details about the device, such as its purpose and how it works.Open in library