Kelvin's harmonic analyser

Made:
1878 in London
maker:
R W Munro and Company
and
William Baron Kelvin Thomson

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Science Museum Group Collection
© The Board of Trustees of the Science Museum

Science Museum Group Collection
© The Board of Trustees of the Science Museum

Kelvin harmonic analyser by R.W. Munro, London, in glass case.

Kelvin's harmonic analyser, 1878. The machine was Invented by William Thomson, Lord Kelvin, (1824-1907), a pioneering Irish physicist. The harmonic analyser was designed to analyse graphical records of daily changes in atmospheric temperature and pressure. It was brought into use by the Meteorological Office in 1878. The tracing point is taken along the curve to be analysed, and its movement causes the seven discs to rotate. Rolling spheres communicate this motion to the recording rollers.

Details

Category:
Mathematics
Object Number:
1946-343
Materials:
brass (copper, zinc alloy) and steel (metal)
type:
harmonic analyser and harmonic analyser and
credit:
Air Ministry, Meteorological Office