Cambridg March {illeg}|16|th 1671.


The book wch my Carrier by forgetfulnesse disappointed me of the last week I have now received & thank you for it. With the Telescope wch I made I have sometimes seen remote objects & particularly the Moon very distinct in those pts of it wch were neare the sides of the visible angle. And at other times when it hath been otherwise put together it hath exhibited things not wthout some confusion. Wch difference I attributed chiefely to some imperfection that might possibly be either in the figures of ye metalls or eye glasse, & once I found it caused by a little tarnishing of the Metall in 4 or 5 days of moist weather.

One of the Fellows of or College is making such such another Telescope wth wch last night I looked on Jup{illeg}|i|ter & he seemed as distinct & sharply defined as I have seen him in other Telescopes. When he hath finished it I will examin more strictly & send you an account of its f{illeg} performances, For it seemes to be somthing better then that wch I made.

Yor humble servant

I. Newton



To Henry Oldenburg Es
at his house about the middle
of the old Pall-mail in



< insertion from lower down f 35v >

Rec. March 18. 71.

< text from higher up f 35v resumes >

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