Abstract
CORRECT time is now so widely distributed that devices for the accurate reading of sundials are scarcely more than curiosities; but as a curiosity it may be worth while to put on record a method which I used from 1875 to 1880, by which the meridian passage of the sun was determined to within one second by means of a shadow, without any lens or other optical appliance, thus:
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MALLOCK, A. Determination of Noon by Shadow. Nature 122, 924 (1928). https://doi.org/10.1038/122924a0
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DOI: https://doi.org/10.1038/122924a0
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