Excerpt from Hints on Porisms: In a Letter to T. S. Davies, Esq. F. R. S. F. S. A. &C. With a Scholium Not Contained in the Letter, Being a Sequel to the Two Tracts on 'Imaginary Quantities,' Published in 1817 and 1818, as a Partial Development of Views Therein Noticed

My Dear Sir,

Your having expressed, in reference to my Tracts, published many years back, on 'Imaginary Quantities', an inclination to be informed whether I had any ideas on the subject of Porisms, which were not to be found in that publication, I may state, that I feel flattered by the inquiry.

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