Tide-predicting machine

device · 1872 · Electric age

A mechanical analogue computer of tides (Kelvin).

What it is made of

• Pulley — has part. Pulleys add up the harmonics.
• Gear — has part. Gear wheels set the harmonics.

Principles and materials it uses

• Fourier transform — uses. A sum of harmonics.
• Brass — is made of. The movement is brass.

History: what it evolved from and what it influenced

• Differential analyser — evolved into. The ideas of Kelvin’s integrating mechanisms.

What it is a kind of

• Computing device — is a kind of. An analogue calculator.

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