SECTION I. MATHEMATICS. 

 XII. ASTKONOMY. 



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 5 th degree of the Zodiac. 



XIII. HYDROSTATICS, OPTICS, SOUND, AND HEAT. 



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 con- 

 troversies 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. 



