Tide-predicting machine

A tide-predicting machine is a device designed to forecast tide levels based on the gravitational effects of the moon, sun, and other celestial bodies. One of the most famous tide-predicting machines was developed by the British mathematician and engineer Sir William Thomson, also known as Lord Kelvin, in the late 19th century. This machine used a series of movable parts and gears to simulate the complex motions of tides through mechanical means.