M le Cat, Hernias with Sacks 221 



Jos. Palmer, Effects of Lightning 223 



Ja. Dodsoti, on Bills of Mortality ibid 



Biographical Notice of Mr. James Dodson ibid 



M. le Cat, Dissection of a Rupture 227 



Wm. Watson, Medical Electricity ibid 



Ja. Short, on Serson's Horizontal Top 22^ 



Dr. T. Heberden, on the Pike of Teneriffe 230 



, on the Weather in Madeira 232 



W. Van IT:'zen, Quant, of Rain at Leyden 233 



Tho. Percival, on a Double Child ibid 



Wm. Watson, on Electricity in Vacuo. . . . ibid 

 Fa. Halle.stein, Astron. Observ. at Pekin . . 238 

 Dr. Mackenzie, Plague at Constantinople. . 239 

 Apothecaries, Catalogue of 50 Plants .... 242 



Wm. Watson, on Medical Electricity ibid 



Jos. Warner, a Case of the Empyema .... 244 



Eruption of Mount Vesuvius 245 



Dr. Wilbraham, of an Hydrophoby ibid 



J. Smeato'.i, Improvement of the Air Pump 247 

 W. Watson, Aphyllon and Dentaiia Hepl. 250 

 Dr. Bond, Machine for striking Whales .. 251 



J. Smeaton, on the Steam-engine 252 



Dr. Parsons, on the Shells of Crabs 254 



F. Blake, Splier. Trigon. reduced to Plane 255 



M. Peyssonni'l, Treatise on Coral 257 



Rd. Brooke, on Inoculation 268 



Horace Walpole, his Case of the Stone . . 269 



J. Parker, Eruption of Vesuvius 270 



Jos. Warner, Stone in the Bladder ibid 



Rev. B. Ray, in a Water-spout 271 



J. EUicott. Influ. of Heat & Cold on Clocks ibid 



J. Smeaton, New Tackle of Pulleys 278 



Wm. Dixon, some Vegetable Balls 280 



Rev. H. Kenroy, Copper Springs of Wicklow ibid 



Dr. Maty, Inoculation at Geneva 282 



Biographical Notice of Dr. Maty ibid 



Dr. Parsons, on Corals, Corallines, &c. . . ibid 

 Dr Mackenzie, Plague at Constantinople. . 283 

 J Short, Efi'ects of Heat & Cold on Clocks ibid 

 Biographical Notice of John Harrison .... 284 

 Henry Eeles, on the Cause of Thunder . . 287 

 Dr. T. Hope, on Couching a Cataract .... ibid 

 M. Mazcas, Analogy of Lightning and Elect. 289 

 M. Nollet, Electricity from the Clouds. . . . 295 



M. Mylius, on the same subject 298 



M. Faget, on the French Styptic ibid 



B. Franklin, the Electrical Kite 301 



Wm. Watson, Exper. on Thunder Clouds 303 



Mr. Brown, Inoculation at Salisbury ibid 



Dr. Henry, an extraordinary Wind ibid 



J. Short, on Frisi's Figure of the Earth 305 



Rev. G. Costard, Eclipse foretold by Thales 310 

 Dr Hosiy, Ca.se of Bones softened, &c. . . 313 



Fra. Drake, on a Roman Altar 3l6 



Dr J. Ward, on the same Altar ibid 



Dr. J. Pringle, on the Jail Fever 318 



Rev. Wm. Borlase, Islands of Scilly 324 



Wm. Watson, making Sea-water Fresh . . 327 

 Sig. Paderni, Antiquities at Herculaneura. . 328 

 M. Clairaut, on Frisi's Figure of the Earth ibid 



Rev. Wm. Borlase, Storm of Thunder 335 



Dr. Henry, Copper Springs at Wicklow . . 338 

 J. Robertson, Log. Lines on Gunter's Scale ibid 



CONTENTS. 



Page 



Vii^c 



John Dollond, Improvement of Telescopes 341 

 Biographical Notice of John Dollond .... ibid 

 Wm. Watson, Therm. Observ. in Siberia, . 344 

 Apothecaries, Catalogue of 50 Plants .... 345 



J. Ellis, Remarkable Coralline ibid 



Henry Baker, uncommon Fossils 347 



Dr. Ward, on Boze's History of the Emperor 



Tetricus 349 



Wm. Watson, on the Flora Siberica 351 



P. Miller, Spondyl. Vulgare Hirsutum 355 



Rev. G. Costard, on Zenophon's Eclipse . . 356 

 Sam. Sharp, Extraction of the Crystalline . . 357 

 Dr. Hume, Fish and Flesh pres. in Lime-wa. 358 

 J. Short, Invention of a new Micrometer. . ibid 

 Serv. Savery, on his new Micrometer .... 359 



J. Dollond, to Measure small Angles 364 



J. Bond, Copper Springs at Wicklow .... 366 

 Dr. Bevis, Gascoigne Inventor of Microscope 369 



J. Short, on the Transit of Mercury 370 



Wm. Watson, on Nollet's Electricity .... 372 

 J. Browning, the Population of Bristol. . . . 379 

 Dr. Stukely, Eclipse predicted by Thales. . 380 

 Dr. Pocock, Giant's Causeway, Ireland 3S2, 383 

 Wm. Kersseboom, on Mortuary Tables . . ibid 

 M. D'Incar\'ille, Observations on China. . . 387 

 T. Melville, Different refrangibility of Light 390 



Mr. Short, Remarks on the same 393 



Jos. Warner, Operation for the Empyema. . 394 

 Ja. Dodson, Inf. Series and Logarithms. . . 396 



Dr. Lining, the Rain at Charlestown 40O 



Da Costa, on a Fossil found at Dudley. ... 401 

 Ja. Short, Euler's Theorem for Aberrations, ibid 



J. Dollond, on the same 402 



Mr. Euler, on the same 403 



Dr. Pringle, Softening, &c. of the Bones. . 406 

 Dr. Bevis and Ja. Short, Astron. Observats. 408 

 J. Ellis, a Cluster Polype, found at Greenland. 409 

 M. Gaubil, Observations at Pekin. ... 411, 412 

 Wm. Shervington, Transit of Mercury. .. 414 



Ja. Simon, Weather Sec. at Dublin ibid 



Sam. Sharp, on Opening the Cornea ibid 



Dr. Ward, Roman Inscription at Bath 419 



Benj. Wilson, Electrical Experiments. . . . 420 



J. Canton, Electrical Experiments 421 



M. Boss, on the vegetable Byssus 425 



Wm. Watson, Remarks on the same ibid 



Ja. Short, Obs. on the Transit of Mercury. 426 

 Dr. R. Simson, on Converging Fractions. . 430 



M. Mazeas, Electricity of the Air 434 



Ja. Silvab'elle, Equinoxes, Nodes, &c 436 



Geo. Costard, Age of Homer and Hesiod. . 440 



Dr. T. Birch, on Nollet's Electricity 446 



Biographical Notice of Dr. Thomas Birch. . ibid 

 Rev. Jos. Spence, Herculaneum Antiquities 447 

 Ja. Dodson, Annuities and Survivorships. . 448 

 Geo. Edwards, Pennsylvania Pheasant. . . . 450 

 Biographical Notice of Mr. George Edwards, ibid 

 J. Ellis, Particular Species of Coralline. . . 453 

 Wm. Arderon, on the Severe Cold Weather. 454 

 M. de L'Isle, Observations of the Planet Mars 455 



J. Ferguson, on his Eclipsareon 456 



Dr. Miles, on the Severe Cold Weather. . ibid 



Apothecaries, Catalogue of 50 Plants ibid 



J. Smeaton, to Measure a Sh4)'s Way. , , . ibid 



