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Published online by Cambridge University Press: 20 January 2009
Of the following properties the first two are obvious; the third was communicated to the Royal Society of London by the Rev. Dr James Booth* in 1854; the others, obtained many years ago, have not as far as I know been remarked. They seem to be more curious than useful.
* See Proceedings of the Royal Society of London, (London, 1656) veil. vii. pp. 42–43.Google Scholar