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*1. A Theological Common-place Book, written from both ends, in Newton's hand.

2. Four folio MS. volumes, bound in red morocco, and labelled “John Conduitt," entirely in Newton's hand.

(1) The Chronology of Ancient Kingdoms amended. Horsley, v. pp. 28—263.

(2) i. A short chronicle from the first memory of things in Europe to the conquest of Persia by Alexander the Great Printed twice by Horsley, v. pp. 3—27 and pp. 267—291.

ii. Another copy of the Chronology of Ancient Kingdoms amended.

(3) Observations on the Prophecies. Horsley, v. pp. 297–491.

(4) De motu Corporum Liber Secundus. This is the treatise De Mundi Systemate. Horsley, iii. pp. 180—242.

*3. A volume of extracts on Alchemical subjects, in Newton's hand.

4. (1) A copy of the 1st edition of the Principia, interleaved with notes in Newton's hand. Among the leaves inserted is the preface to the 3rd edition. In a miserable plight from damp and ill-treatment.

(2) A copy of the second edition of the Principia, interleaved with notes and additions in Newton's hand.

5. A MS. copy of a portion of the Arithmetica Universalis, apparently an early copy.

6. A copy of Schooten's edition of Des Cartes' Geometry, Lugd. 1649, with a few notes in Newton's hand.

7. A short treatise on the beginning of Algebra, in Newton's hand : at the other end are extracts from Quintus Curtius, and a long prayer, and a sermon on Lev. xix. 18, not in N.'s hand.

8. A common-place book written from both ends, with “ Isaac Newton, Trin. Coll. Cant. 1661," in the beginning.

This contains, at one end, Definitions from Aristotle's Organon, an abridgement of the Phisiologia peripatetica of John Magirus, and some Astronomical notes by Newton : at the other, Sentences from Aristotle's Ethicks, Annotationes ex Eustachii Ethic., Axiomata,

Epitome G. J. Vossii partionum oratoriarum, a note on the word Idea, Remarks on “Quæstiones quædam Philosophicæ,” details of the observation of the comet of 1664, of the effect of sunlight on the eyes, etc.

*9. A copy of “ Secrets revealed, or an open entrance to the shut palace of the King,” &c., by W. C., London, 1669, with notes in Newton's hand.

*10. A bound MS. book containing at one end memoranda of Newton's expenses at College, and at the other a short outline of Trigonometry and Conic Sections in Newton's hand.

11, 12. Two MS. note books, bound, containing a Compendium of Elementary Mathematics, apparently made by St John Hare. In one of the volumes Abotesley is added to the name, and the following “Sibi, non aliis hæc.” To the other volume the date 1675 is given after the name.

13. Lettres de M. Leibnitz and M. le Chevalier Newton sur l'invention des Fluxions et du Calcul Differentiel.

This is a proof of part of the 1st edition of Desmaizeaux's Recueil, with corrections. (Several pages are wanting at the end.)

14. A college note-book, written from both ends, containing early exercises-extraction of the square and cube root, elementary Geometry, &c.—followed by annotations of Wallis's Arithmetica Infinitorum. This is preceded by a note of Newton's fixing by an entry in his account-book the date of the annotations as being in the winter 1664-5, at which time he says he found the method of infinite series. Also notes on music, chances, &c.

This is the note-book referred to in Brewster's Life of Newton, Vol. i. p. 22.

15. Proof sheets of the edition of Newton's Opticks, with a few MS. additions by Newton.

16. An early copy (MS.) of the Lectiones Opticæ, Jan. 1669.

17. A book, containing the commencement of a work on Hydrostatics, the greater part consisting of a dissertation partly metaphysical, partly theistic, on the constitution of matter, motion, the Cartesian philosophy, etc.

18. A common-place book, written originally by B. Smith, D.D., with calculations by Newton written in the blank spaces. This contains Newton's first idea of Fluxions.



*1. Copy of the agreement relating to Sir I. Newton's MSS. Copy of bond given by Conduitt in relation to Sir I. Newton's papers. An account of John Conduitt's right to the MSS. of Sir I. Newton.

2. Six drafts (all in Newton's hand) of a scheme for establishing the Royal Society.

3. Two printed copies of Newton's letter to the Abbé Conti dated Feb. 26, 1716, with remarks of Newton on the letter of Leibnitz to the Abbé Conti—the latter dated 19 May 1716 (printed in Des Maizeaux. Recueil, Tome ii. pp. 20, 82, 107).

4. Advertisement of the Book “De Systemate Mundi” in Conduitt's hand, with memoranda and modern letters on Newton's life.

5. On Education, &c. On educating youth in the Universities. Testimonial to Mr David Gregory for Astr. Prof. at Oxford. Dr Gregory on the method of teaching in the Colleges in Scotland. Two Chapters on Cosmography. Beginning of “the Elements of Mechanicks.” 6. Systema Mundi. 7. Miscellaneous.

An account of the System of the World described in Mr Newton's principles of Philosophy.

8. Astronomia, cap. 1, 2, 3, 4. This contains a drawing and description of a quadrant or sextant for measuring angles by reflexion.

9. Phænomena 14-15.
10. Scheme of Observations recommended to a traveller.
*11. Papers relating to legal matters.
12. General proportions for the parts of a ship.

*13. Estimates of the expenses of Government in 1668 and 1675, and a chronological tree of the royal family 1689.

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*14. John Conrad de Hatzfeld on a scheme for Perpetual Motion.

List of proposed machines by le Sieur Balesme, with fragments on finding the Longitude.

15. Extracts from Phil. Trans, and other fraginentary Papers.

Graphical construction by Newton relating to the conjunction of Jupiter and Saturn, &c.

*16. Fragments of the Historia Cælestis.

*17. “Barometri altitudines per totum itineris mei Alpini decursum." June 25—July 13. No author's name or year.

*18. Testimonial for E. Paget, M.A., *Trin., as a person fit to teach navigation to the King's satisfaction. 3 April, 1682.

19. A scheme of Mathematical learning proposed for Mr Stone's foundation (at Christ's hospital). Several drafts.

20. Newton's remarks on this. 21. Draft of his letter on the subject. 22. Long letter by Newton in answer. *23. Two drafts of a paper headed, The case of Trin. Coll., on the fellowship dividends.

*24. Henricus Sextus, apparently a College or University declamation.

*25. A Latin phrase-book, under the heads of English words in alphabetical order, the first word abate, the last conduct. At the other end are extracts from Epiphanius, S. Augustine, &c.

*26. Phrases from Terence's Andria, with occasional translations.

*27. Miscellaneous fragments relating to personal matters. The packet contains a torn scrap of a letter from Newton's mother to him, 6 May, 1665, and one from Catharine Conduitt to Newton.

28. A Problem in Chances, not in Newton's hand. *29. A Demonstration in French on the Quadrature of the Circle, by Dan Waeijwel of Amsterdam.

*30. Scraps.




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Catalogue of Manuscripts of Tycho Brahe.

Draft of Latin letter to Roemer relating to Tycho's observations; similar letter in English ; both in Newton's handwriting.

Arbuthnot to [Newton]? July 30, 1706.

Letter from Newton and the other Referees to Prince George of Denmark concerning the publication of Flamsteed's observations, Jan. 23, 1705.

Two drafts of Articles of Agreement made between the Referees and Mr John Flamsteed. Flamsteed to Newton, Oct. 25, 1705.

April 10, 1708.
Copy of an Order sent to Mr Flamsteed, July 14, 1708.
Flamsteed to Sir Christopher Wren, July 19, 1708.
The Referees to Sir Isaac Newton.

Account of the expense of printing Mr John Flamsteed's Observations.

Order to pay £125 to Flamsteed for his first Catalogue of fixed stars.

Receipt for the same from Ja. Hodgson.

Flamsteed to Newton, April 23, 1716 (asking for the return of his MSS.) printed in Baily's Flamsteed p. 322.

Order by Queen Anne for the appointment of a Board of Visitors of the Royal Observatory dated Dec. 12, 1710.

Drafts of Correspondence relating thereto.

Petition to the Queen of the President, Council and Fellows of the Royal Society of London, for the grant of a new place of Meeting.

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