CONTENTS. 



Page 



The Weaver's Larurn, Wm. Arderon .... 180 



A Water wheel, Wm. Arderon 182 



Machine for sounding the Sea, Wm. Cock 228 



6 



Page 

 Clepsydra or Water-clock, Cha. Hamilton 236 

 Machine to write Music, Mr. Creed " . . 332 



I'ables of Specific Gravities, Dr. Davies . 



7 



Improved Hygroscope, Wm. Arderon 



8 



Extraordinary Echoes, R. Southwell . 



Music of the Ancients, Pepusch 268 



9- 



Micrometer to the Microscope, Hollmann 93 

 BuflFon's Burning Mirror, Needhani 344 



Hydrostatics. 



536 



Pneumatics. 

 .. 214 Deal- wood Hygrometer, Wm. Arderon . . 242 

 Acoustics, Music. 



253 Machine to write Music, Mr. Creed 332 



Optics. 



Buffon's Burning Mirror, Nicolini 344 



Burning Mirror, Buffon 558 



10. Electricity, Magnetism, Pyroteckny, Thermometry, &c. 



Magnetical Experiments, G. Knight 71 



On Electricity, J. H. Winkler 74 



Electric Fire, S. C. Hollmann 93 



Firing Phosphorus by Electricity, Dr. Miles 107 

 Observations on Electricity, Winkler ... 109 

 Variations in Magnetic Poles, G. Knight . . 1 22 

 Warming Rooms by hot Steam, Wm. Cook 125 

 Extraord. Electrical Phenomena, De Boxes 127 

 Electricity and Lum. Emanations, Dr. Miles 136 

 Electrical Experiments, Wm. Watson 151, 195 



, Dr. Miles 191, 198 



Quicksilver luminous in a Tube, Trembley 199 



Electrical Fire, Dr. Miles 207 



Electricity of Water, Dr. Miles 213 



Strength of Electrical Effluvia, Anonymous 215 



Electrical Observations, Dr. Miles 232 



Effects of Electricity, J. H. Winkler 251 



Electricity of Glass disturbs the Mariner's 



Compass and nice Balances 262 



Electrical Experiments at Paris, T. Needhara 263 

 Communication of Electricity, Monnier . 

 Effect of Elect, on Vegetables, Browning 

 On Monnier's Electricity, Wm. Watson , 

 Uncommon Gleam of Light, CoUinson . . , 



Class III. 



1 



The Eye-sucker, Henry Baker 15 



Fresh water Polypi, Abr. Trembley 75 



Elephants' Teeth, Henry Baker 110 



Curious Wasps' Nests, J. Bartram 123 



Quadruped from Bengal, Dr. Parsons .... 145 



On Gould's Account of Ants, Dr. Miles . . 298 



The Prickleback, &c. Wm. Arderon 322 



Small Water Polypi, Abr. Trembley 377 



2. Botany. 



Buffon's burning Mirror, T. Needham .... 344 



, Nicolini ibid 



Pirorganon, or Electrical Machine, Winkler 345 



Thermometers within and without. Miles . . 372 



Knight's Magnet. Experiments, M. Folkes 390 



Metalline Thermometer, Dr. Mortimer . . 397 



Remarks on the same. Dr. S. Hales 407 



Electricity continued, Wm. Watson . . 408, 410 



Velocity of Electricity, Wm. Watson 440, 553 



Metalline Thermometer, M. Johnson .... 4.59 



Laws of Electricity, J. Elliot 475 



Medical Electricity, J. H. Winkler 494 



, Henry Baker 497 



On checking Fire, Dr. Stephen Hales 498 



Magnetic Variation, Geo. Graham 499 



A Coat fired by Electricity, R Roche .... 512 



Sparkling of Hair and Flannel, B Cooke . . 532 



Electrical Experiments, Dr. Stephen Hales 534 



Burning Mirror, Butfon 558 



Thermometers and Weather, Dr. Miles . . 616 



275 Effect of Lightning on the Needle, Waddel 652 



306 On the same Needle, G. Knight 653 



308 Electricity of Glass, &c, G.M. Bose 681 



337 Agreement of Thermometers, &c. Miles , . 686 



Natural History. 

 Zoology. 



Of the Marmot, J. T. Klein 473 



The Cornel Caterpillar, Ph. Skelton 500 



On Caterpillars, Abr. Trembley 504 



Locusts in 1747 and 1748 629 



Double-horned Rhinoceros, Sir H. Sloane 655 



The Rana Piscatrix, Dr. Parsons 658 



I'he great Black Wasp, J. Bartram 6gg 



Catalogue of 50 Plants, Jos. Miller 30 



Cyanus Foliis Radicalibus, Haller 31 



On Mushrooms, Robert Pickering ibid 



Catalogue of 50 Plants, Jos. Miller 82 



On a new Plant, Wm. Watson 93 



New Species of Fungus, J. Martyn ^f) 



Old Melon Seeds, Roger Gale 100 



Catalogue of 50 Plants, Jos. Miller 128 



Curious Sea-plant, Sir Hans Sloane 198 



Catalogue of 50 Plants, Jos. Miller 251 



, Jos. Miller 370 



, Apothecaries 635 



Salvadora Plant, L. Garcin ibid 



Tradescant's Garden, Wm. Watson 668 



