Extracts from Newton's notebooks

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In one of S^r I. N.^s paper books near some annotations of D^r Wallis’s Arithmetica Infinitorum – There is the following Mem^m in S^r Isaac’s hand writing

Iuly - 4 -1699 – By consulting an account of my expenses at Cambridge in the years 1663 – & 1664 I find that in the year 1664 a little before X^mas I being then Senior Sophister I bought Schooten’s Miscellanies & Cartes’s Geometry (having read this Geometry & Oughtred’s clavis above half a year before) & borrowed Wallis’s works & by consequence made these annotations out of Schooten & Wallis in winter between the years 1664 & 1665 – At w^ch time I found the method of infinite series & in sum̄er 1665 being forced from Cambridge by the plague I computed the Area of the Hyperbola at Boothby in Lincolnshire to two & fifty figures by the same method –

Isaac Newton

Mem^m in the same book a good deal upon chances & Musick

By another book it appears he bought in 1667 the History of the Royal Society three Prisms — & also Bacon’s Miscellanies /pret – 1.6\

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In another paper book – S^r I has writt in his own hand that Dec^r. 20^th 1664 & on {sic} Saturday Dec^r. 27. 1664

Oct^r. 8. 1665 – D^o

On a loose paper

M^r Oughtred Clavis being one of the best as well as one of the first Essays for reviving the Art of Geometrical Resolution & Composition I agree with the Oxford Professors that a Correct Edition thereof to make it more usefull & bring it into more hands will be both for the honour of our nation and advantage of mathematicks

Is. N.

I find in a paper book of his to w^ch he has put his name & 1659 – Rules for drawing & making colours – copied

& in another of the same year a Prosodia writt out

In a letter to the Lord Provost of Edinburg offers to allow Maclaurin £20 pr an^m till Gregory’s place falls