CONTENTS. 



Page Page 



On a Vacuum, Dr. Desaguliers 480 On the same subject, Desaguliers 632 



Resistance of Fluids, by the same 506 Again on the same, by the same 638 



Force of Bodies in Motion, Pemberton 570 



On the Paris Weights, Desaguliers 



2. Statics. 



494 Spec. Gravity of Solids, Dr. Jurin 538 



3. Astronomy, Navigatioriy Chronology. 



On Kepler's Problem, John Keill 1 



Celestial Observations, Flamsteed 17 



Astronomical Observations, Bianchini 92 



On the Comet of 168O, G. Kirch 114 



New Star in Collo Cygni, by the same. . . . 153 



On a Solar Eclipse, Dr. Halley 155 



Celestial Observations, Flamsteed I68 



The great Solar Eclipse of 1715 175 



Nautical Meridian Line, J. Perks 184 



History of New Stars, Dr. Halley 196 



Nebulae or Lucid Spots, by the same 205 



Astronomical Observations, Ja. Pound .... 212 



On the Sun's Parallax, Dr. Halley 243 



Unusual Lustre of Venus, by the same. . . . 250 



On the Primary Planets, Ja. Pound 264 



Occultations of Stars, Dr. Halley 271 



Gascoigne's and Crabtree's Letters, Derham 295 



Longitude by the Moon and Stars, Halley. . 308 



On a Comet in 1717, Dr. Halley 322 



Change of Stars Latitudes, by the same . . 329 



Satellites of Saturn, Ja. Pound 349 



Tables of the same Satellites, Halley .... 351 



On a Comet at Berlin, M. Kirch 363 



On a Solar Eclipse, by ditto ibid 



The same at Norimberg, Wurtzelbaur .... ibid 



Astron. Observ. by Pound, Derham, &c. . . . 373 



Transit of Jupiter's Satellites, Pound 386 



Max. and Min. of Celes. Motions, Demoivre 395 



Tables of Jupiter's first Satellite, Pound . . 426 



Astronomical Observations, Ja. Pound .... 442 



Parallax of the Stars, Dr. Halley 443 



Infinity of the Stars, ditto 456 



Number, Order, and Light of tliem, ditto 457 



Astronomical Refractions, ditto 517 



Planets Places by the Stars, ditto 530 



On a Solar Eclipse, ditto 604 



On the same, by Mr. Geo. Graham ibid 



A Comet seen at Berlin, Chr. Kirch 621 



Satellites of Jupiter and Saturn, Hadley . . 665 



4. Projectiles, 

 Parabolic Projectiles, Dr. B. Taylor 510 



5. Mechanics. 



Centre of Oscillation, Dr. B. Taylor 7 A Water Engine, by ditto. 



On a Vacuum, Dr Desaguliers 321 



6. Hydrostatics, Hydraulics. 



Ascent of Water between Planes, Hauksbee 40 



Spirits of Wine, by ditto 41 



On the Diving Bell, Dr. Halley 258 



De Motu Aquae, &:c. Poleni 324 



Suspension of Water, &c. Dr. Jurin 330 



Motion of Effluent Water, by ditto 



On the Diving Bell, Dr. Halley 



Cataracts of Niagara, P. Dudley . . 

 On Spouting Water, Dr. Jurin . . . . 



550 



336 

 521 

 574 

 595 



7. Pneumatics. 



Barometrical Experiments, Scheuchzer. ... 166 

 Variation of the Barometer, Desagvdiers . . 283 

 Resistance of the Air, by ditto 428 



On the same subject, by ditto 430 



On Heights by the Barometer, Dr. Halley 496 

 Height of the Barometer, Geo. Graham . . 537 



