<16r> < insertion from the bottom of the page >

Mr Newtons letter to M. Old.
relating to M. Hooks Objections to
his new Doctrine of Light, and to
M. Hugens remarks about ye
grinding of Parabolical Conoids.

< text from f 16r resumes >

Cambridg. Feb 20th. 71.


I received yor Feb 19th. And having considered Mr Hooks observations on my discours, am glad that so acute an objecter hath said nothing that can enervate any part of it. For I am still of the same judgment & doubt not but that upon severer examinations it will bee found as certain a truth as I have asserted it. You shall very suddenly have my answer.

In Monsr Hugenius's letter there are severall hansome & ingenious remarques. And what hee saith concerning the grinding Parabolicall conoids by geometricall rules I do wth him dispair of, but I doubt not but that the thing may bee in some measure accomplished by mechanicall devises. This is all at present from

Yor. faithfull Servant

I. Newton.


To Mr Henry Oldenburg Esqꝫ
at his house about the middle
of the old Pall-mail in




|Rec. Feb. 21. 712.|

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