Clocks showing Mean and Sidereal Time Simultaneously


IN the Paris Observatory a number of clocks provided with two dials showing sidereal and mean time were installed last year as part of the permanent equipment of the Observatory. This suggested to me an investigation of the many ingenious attempts to achieve it, and to seek a simpler and better method.

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HOPE-JONES, F. Clocks showing Mean and Sidereal Time Simultaneously. Nature 138, 931–932 (1936).

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