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published from the originals in the library of Trinity College, Cambridge; together with an appendix containing other unpublished letters and papers by Newton; with notes, synoptical view of the philosopher's life, and a variety of details illustrative of his history, by J. Edleston.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published from the originals in the library of Trinity College, Cambridge; together with an appendix containing other unpublished letters and papers by Newton; with notes, synoptical view of the philosopher's life, and a variety of details illustrative of his history, by J. Edleston.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.

    167/430 (page 61)
    to 692, or perhaps as 3919 to 3951 the difference being 32 miles. I think [228 to 229] should be put for [689 to 692] & the difference of 32 miles may be allowed for in the latter part of the Proposition. But I have lost my copy of the emendation I made to that Proposition & the Lemmas preceding, & so know not how to make this cor- rection. If you can mend the numbers so as to make ye precession of the Equinox about 50 or 51, it is suf- ficient. I am Yor most humble Servant For the Rnd Mr Cotes Professor of Is. Newton Astronomy, at his chamber in Trinity College in Cambridge. LETTER XXXY. COTES TO NEWTON. Sr Cambridge Feb 16th lTfz I received Your last of ye 12th of this Month. Tis very evident that ye 3(1 section of Proposition xxxvif1' ought not to be altered. I had observ’d, that in an addition which You have made at ye bottom of page 463, cosinus ought to be chang’d into sinus versus; & thereupon, (without any further consideration), I had applied the same change to ye 3d section of ye following Proposition. I will observe Your directions as to ye Diameters of ye Sun & Moon in Corol. 3; retaining in all other places 32'. 12 for ye Sun. In ye Scholium of ivth Proposition I think the length of ye Pendulum should not be put 3 feet & 8 lines ; for the descent would then be 15 feet 1 inch 11 line. I have considered how to make yt Scholium appear to the best advantage as to ye numbers, & I propose to alter it thus. To take 57220 Toises for ye measure of a degree, instead of 57230; for 57220 is ye nearest round number to a mean