Correspondence of Sir Isaac Newton and Professor Cotes : including letters of other eminent men, now first published from the originals in the library of Trinity College, Cambridge; together with an appendix containing other unpublished letters and papers by Newton; with notes, synoptical view of the philosopher's life, and a variety of details illustrative of his history, by J. Edleston.

  • Isaac Newton
Date:
1850
Catalogue details

Licence: Public Domain Mark

Credit: Correspondence of Sir Isaac Newton and Professor Cotes : including letters of other eminent men, now first published from the originals in the library of Trinity College, Cambridge; together with an appendix containing other unpublished letters and papers by Newton; with notes, synoptical view of the philosopher's life, and a variety of details illustrative of his history, by J. Edleston. Source: Wellcome Collection.

    157/430 (page 51)
    LETTER XXIX. NEWTON TO COTES. Sl Martins Street in Leicester ffields London July 28th 1711. Sr I received your Letters & the papers sent me by the Printer But ever since I received yours of June 23 I have been so taken up with other affairs that I have had no time to think of Mathematicks. But now being obliged to keep my chamber upon some indisposition wch I hope will be over in a day or two* I have taken your letter into con- sideration. You think that in the Corollary to the 48th Proposition these words [Nam lineola Physica ey quampri- mum ad locum suum primum redierit, quiescet] consist not wth what I assert & prove in the Proposition, viz1 [& propterea vis acceleratrix lineolse Physicse 67 est ipsius distantia a medio vibrationis loco Q] But I suspect that you take the words [ad locum suum primum] in another sence then I might intend them, ffor when all the lineolae physicse 67 are returned to their first places or places in wch they were before the vibrations began, the medium will be uniform as before & the vis acceleratrix of the lineola physica ey will cease, whether that lineola arrived to its first place in the beginning middle or end of the vibrations. For making the Corollary more intelligible, these words may be added to the end of it. Partes fluidi non quies- cent nisi in locis suis primis. Quamprimum in loca ilia motu retardato redierint, component Medium uniforme quietum quale erat ante vibrationes excitatas. In altering the 48th Proposition you have shortned the Demonstration. If you had proposed your alteration of the Corollary I should have been better able to compare the whole wth mine. * He was sufficiently recovered by the following Thursday, (Aug. 2,) to preside at a meeting of the Council of the Royal Society on that day. 4 2