Abstract
June 22, 1686. The Minutes of the Dublin Society from Apr. 26, to May zyth were read: Also a dis course of Mr. Caswels, Shewing how the Shadow may goe back on an Horizontal' plane in any latitude, if the stile point betwixt the Tropics; also on any other plane unlesse the situation thereof keeps the Sun from shining long enough thereon; together with the calculation of the time and quantity of the shadow's regression, according to the various situations, of the stile and plane.
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Early Science at Oxford. Nature 115, 965 (1925). https://doi.org/10.1038/115965a0
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DOI: https://doi.org/10.1038/115965a0