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1. Astronomical communications from Flamsteed, including longitudes and latitudes of stars for 1686, and of 21 stars compared with the comet of 1680.

2. Lunar distances in 1677 and in 1685, by Flamsteed, with copies of these two papers, one by Newton.

3. Equations of Moon's Apogee. Table by Newton for Flamsteed.

Elements of the Comets of 1472, 1580, 1585, 1652, 1661, 1665, 1672, 1677, and 1686, as calculated by Halley.

4. Eclipse Tables for a period of 18 years, by Halley.

5. Observations of Eclipses, sent to Newton from various quarters, with a diagram of the annular eclipse of 1686 · by E. de Louville (Paris).

6. Transits of Satellites of Jupiter and of their shadows across the disc of the planet, observed by Pound at Wanstead.

7. Table of Declinations of every 5th degree of the Zodiac.


1. A treatise, with a table, on the Division of a Monochord. Not in Newton's hand, but apparently of his composition. Followed by an extract in his hand “out of Mr Sympson's Division Violist.”

2. Scrap relating to the velocity of sound; also on the back a note on the proportionality of mass to weight.

3. Manuscript copy of Newton's Optical writings, and of controversies about them.

4. Latin draft of the Opticks, Book I., Part I. (1 sheet). 5. Answer to objections made to Newton's Optical Theories. Also a scrap with memoranda about the Newtonian telescope.

6. Scrap. Memorandum of observations on the colours of thick plates.

7. Fragments on Light and Heat.
8. Proposed addition to Newton's Opticks.

On the Refraction observed in Iceland Spar, and Note “to the Reader" relating to it.

9. Fragments on Opticks. 10. Optical experiments.

11. Figure and description of a sheep's eye. Printed by Brewster i. 420.

12. Speculations as to the constitution of matter and the nature of the action of heat.


1. Copies of Letters from Leibnitz, Slusius, &c. to Oldenburgh.

2. Copies of various Mathematical papers by Tschirnhausen, Leibnitz, Slusius, &c.

“Sur la Cubature du coin Spherique" par M. de Lagny. 4. Fragments on Mathematical subjects by Cassini, Craig, and Morland.



1. Various proposals for finding the Longitude at Sea.

2. Several drafts of a Report by Newton to the Lords of the Admiralty on the different projects for determining the Longitude at Sea.

3. Draft of a letter by Newton on the same subject. 4. Two shorter drafts of the same letter.




(1) 1. Notes out of Philalethes.

2. On Ripley's Vision; “Sir G. Ripley his letter to K. Ed. IV. unfolded.'

3. 3 tracts. De metallorum metamorphosi, Brevis manductio ad rubinum cælestem, Fons Chemica Philosophiæ.

4. Extracts from Raymond Lully. 5.

an author unnamed. 6.

various authors. 7. "Artephius, his secret book."

8. Basil Valentine; on the minerals of Hungary, Carinthia &c., and the conditions of their formation, and on the transmutation of metals and the separation of the three principles, and of vitriol.

Jodochus a Rehe; Processes for preparing the Philosopher's stone from MSS. in possession of Dr Twysden. Copies of 4 letters from Faber to Dr Twysden, 1673—4, recounting success of experiments in preparing spirits of mercury. Notes on Faber's work.

Hermes. Tabula smaragdina et commentarium. 10. The same in English.

11. “The Epitome of the treasure of health written by Edvardus generosus Anglicus innominatus, who lived A. D. 1562.”

12. Hadrian Mynsicht. Aureum seculum redivivum. Testamentum de philosophorum lapide. Both in hexameters.


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13. Ex Turba philosophorum.
14. Preparatio Mercurii, ex MSS. Philosophi Americani.

15. Liber Mercuriorum Corporum. On the back an explanation
of the symbols in it.
16. 47 Alchemical recipes, the work of an old Priest, viz. B.

Ex Rosario magno. 18. Emblemata Michaelis Maieri, comitis Germani. 19. Of chemical authors and their writings. 20. Collectiones ex novo lumine chemico. 21. Ex codicillo R. Lullii (Colon. 1563). 22. Notes mythological and alchemical. 23. Account of furnaces, &c. 24. Extracts from Flamel and several other authors. 25. A page of references to a work not named. 26. Loca difficilia in novo lumine Chymico explicata.

27. Extracts: clavis aureæ portæ, medulla Alchemiæ, de Lapide vegetabili, Pupilla Alchemiæ, &c.

28. Basil Valentini Currus triumphalis antimonii.
29. Alphabetical explanation of common chemical words.
30. Miscellaneous references.

31. Abstract of a treatise on Nature's obvious laws and processes in vegetation.

32. Out of Schroder's Pharmacopoeia.'


1. The book of N. Flamel, in English.

2. The metamorphoses of the planets, with two folios of notes which are in the nature of memoranda of points adverted to in the treatise. 3. Maier's tracts:

Symbola aureæ mensæ duodecim nationum (an account of chemical writers in 12 books).

Lusus serius. (On the medicinal virtues of mercury, tutty, &c.)
Atalanta fugiens.

Viatorium. (A chemical interpretation of some parts of ancient mythology.)

Septimana philosophica, 6 days, 7th day wanting.

4. Notanda chymica. Out of Maier (1 f.).

5. Regulæ... de lapide philosophico authore anon. and Maier's figures prefixed to Valentine's keys (1 f.).

6. Ex Epistola Edm. Dickenson ad Theodorum Mundanum (2 f.).

7. Tabula Smaragdina and other extracts. Hieroglyphica Planetarum (1 f.).

8. Extracts apparently from Van Helmont. On the 3rd page, last line but two, occurs “Terra juxta parallelos rotunda est, juxta meridianos ovalis. Hallucinatur.”

9. Notes chiefly from Philalethes on Ripley.
10. On Ripley's gates (2 f.).
11. Ripley expounded (2 f.).
12. Notes on Ripley (an abstract).
13. Thesaurus thesaurorum, in English (1 f.).
14. A key to Snyders.
15. Sententiæ notabiles expositæ (1 f.).

16. Sententiæ luciferæ et conclusiones notabiles (4 f.). A note relating to mint affairs on top of first page.

17. Practica Mariæ Prophetissæ in artem Alchemicam (1 f.).

18. De igne sophorum et materia quam calefacit (1 f.) extr. from various authors.

19. Notanda chemica from various authors (1 f.).
20. De secreto solutionis (1 f.) from various authors.

21. The three fires. The work with sol vulgar. The several works (1 f.).

22. Clavis.”

23. Extracts from various authors, chiefly alchemical, but some notes also about the occurrence of minerals (1 f.).

24. Verses at the end of B. Valentine's mystery of the microcosm.

25. The standing of the glass for the time of Putrefaction. The hunting of the Green Lyon, in verse, with some notes by Newton.

26. “Pearce the black monck upon the Elixir" (verse).

27. “Out of Bloomfield's Blossoms, and a short work that beareth the name of Sir George Ripley.”

28. Extracts from Norton's ordinal, Chaucer's tale of the Chanon's yeoman, the work of Richard Carpenter, Dastin's dream.

29. Several questions concerning the Philosopher's stone, no author named (1 f.).

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