CONTENTS. 



Astronomical Obs. at Vienna, Liesganig . . 



The Comet of l(i82. Messier 



Transit of Venus in 1769, Hornsby 



Of a Solar Eclipse, Messier 



Observation of a Solar Eclipse, Lulofs . . . . 



On two New Comets, Messier 



On a New Comet, Brice 



Transit of Venus at Upsal, Mallet 



Measure of Degrees of Ix)ngitude, Michell 



Parallaxes of Altitude, Mallet 



Observation of a Solar Eclipse, Messier . . . 



On the same. Prince de Croy 



Long, by Jupiter's Satellites, Wargentin . . 



Shadow of a Spheroid, Witchell 



Thoughts on Comets, Winlhrop 



On the Sun's Distance, Horsley 



Obs- of a Solar Eclipse, Cook 



Parallax of Fixed Stars, Michell 



Twinkling of Fixed Stars, Michell 



Construction of Sun Dials, Ferguson 



Height of Sun's Atmosphere, Horsley . . . . 



Obs. of a Solar Eclipse, Pigott , 



Measure of the Meridian, Liesganig 



Parallaxes of Sun and Moon, Murdoch . . . . 



Astron. Obs. in America, Holland 



Question in Chronology, Horsefall 



On the Sun's Parallax, Planman 



On the Menstrual Parallax, Maskelyne . . . . 



On the same, Smeaton 



Obs out of the Meridian, Smeaton 



Astronomical Observations, Zannoni 



Meas. in Pennsylvania, Maskelyne 



On the same. Mason and Dixon 



Length of a Degree in ditto, Maskelyne . . 



Page 

 220 

 263 

 265 

 274 

 276 

 286 

 287 

 289 

 291 

 34.4 

 3i7 

 ibid 

 352 

 372 

 405 

 411 

 422 

 423 

 4:)« 

 454 

 456 

 458 

 497 

 600 

 .507 

 519 

 520 

 535 

 ibid 

 543 

 5.54 

 564 

 560 

 573 



Phenomena at the same. 

 Observation of the same, 



Page 



Astron. Obs. in ditto. Mason and Dixon . . 578 



Astron. Obser\'ations, Mayer 583 



Observ. of the Transit of Venus, Horsefall 625 



Observ. of the same, Hornsby ibid 



Observation of the same, Horsley 629 



, Bevis 63 1 



, Canton 632 



Hirst 639 



Ludlam 641 



, Holland 6l2 



, Dixon 6%4i 



— , Bayley ibid 



, "Wright 646 



, Mayer 648 



Obs. of a Solar Eclipse, Smeaton ibid 



Observation of the Transit of Venus, Smith 649 



Observation of the same, Wargentin ..... 651 



, "Wilson 652 



, Lind 655 



— ^— — ^— , Jardine 657 



, Winthrop 658 



Observation of a Lunar Eclipse, Lind .... 66l 



Obs. of the Transit of Venus, &c. Lalande 663 



Observation of the same, Aubert 665 



Astronomical Observations, Maskelyne . . . 67ci 



Eclipses of Jupiter's Satellites, "Wilson .... ibid 



Obs. of the Transit of Venus, &c. Ferner . . 671 



Observation of the same, WoUaston 672 



— ■ , Biddle ,. 673 



, Harris 676 



—^ , Leeds 679 



Astronomical Observations, Messier 682 



Transit of Venus, Wales and Dymond ... . ibid 



Obs. of the Transit of Mercury, Winthrop 69 1 



3. Hydrostatics. 



Specific Levity and Gravity of Cork, Human Bodies, &c. Wilkinson 204 



4. Pneumatics. 



On the Portable Barometer, Spry 201 



6. Optics. 



An Observation in Optics, Edwards 4 



Improvement in Telescopes, Dollond 194 



New Microscopes at Naples, Eyles Stiles . . 245 



6. Electricity, Magnetism, 



Observations in Electricity, Wilson 44 



Elertrical Experiments, Bergman 109 



Preventing Damage by Lightning, Wilson .. 147 



Temperature at Different Heights, Heberden 2 1 8 



Electrical Experiments, Beccaria 291 



Magnetic Variations, Ros-s 336 



On the same Subject, Mountayne ibid 



Electricity of the Tourmalin, Bergman .... 343 



Locked Jaw cured by Electricity, Spry ... 39 1 



Electrical Apparatus, L'Epinasse 4l6 



Heat of Bath-waters, Howard 419 



Heat of Bath and Bristol Water, Canton . . 420 



On the Naples Microscopes, Baker 287 



Working Telescope Glasses, Short 69 1 



Pyrotechny, Thervwmetry, &c. 



Therm. Obs. at Derby, Whitehurst 440 



Electrical Experiments, Beccaria 445 



A New Electrometer, Lane 475 



Dif. Temper, in Dif. Ages, Barrington 508 



Prism. Colours by Electricity, Priestley ... 510 



Extraordinary Heat at Rome, Byres 579 



Parabolic Burning Mirrors, Wolfe 589 



Lateral Force of Electricity, Priestley .... 6OO 



Force of Electrical Explosions, Priestley . . (i03 



To Secure St. Paul's from Lightning, Com. 620 



Magnetic Variations, Wales 68*- 



