Letter to Edmund Halley on the sun's parallax to the moon and other matters Isaac Newton c. 223 words The Newton Project Falmer 2014 Newton Project, University of Sussex

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 1 March 1687, in English, c. 229 words, 3 pp. 3 pp.

in English

Published in H.W. Turnbull (ed), The Correspondence of Isaac Newton, vol. 2 (Cambridge: 1960), p. 470

 EL/N1/60, Royal Society Library, London, UK UKLondonRoyal Society Library EL/N1/60 1 March 1687 England English Holograph Edmund Halley Unknown Hand Unknown Cataloguer (1) Unknown Cataloguer (2) MathematicsCorrespondence Transcription by Daniele Cassisa Code audited by Michael Hawkins
60Newton 1960

SrSir

You'l receive yethe 2d Book on Thursday night or Friday by yethe Coach. I have directed it to be left wthwith Mr Hunt at Gresham Coll. Pray let me beg yethe favour of a line or two to know of yethe receipt. I am obliged to you for pushing on yethe edition because of peoples expectation, thô otherwise I could be as well satisfied to let it rest a year or two longer. Tis a double favour that you are pleased to double your pains about it. Dr Wallis's papers may be long & I would not give you yethe trouble of transcribing them all. The heads may suffice. The resistence in swift motions is in a duplicate proportion to yethe celerity. The deduction of yethe Suns Parallax from yethe Moons variation I cannot promise now to consider. When Astronomers have examined whether there be such an inequality of her motion in yethe Quadratures as I metintioned in my last & determined yethe quantity thereof, I may take some occasion perhaps to tell them yethe reason. No more at prsentpresent from

YorYour most affectionate humble

Servant

Is. Newton.

Feb. Cambridge. March 1st –867.

For Mr Edmund Halley to be left wthwith Mr Hunt in Gresham College in London. 2 Journall-Book R S. no. 8. pag: 132. Read Mar 2: 1686.