Vi CONTENTS. 



3. Hydraulics. 



Page Pa Re 



On a Water Spout, Patr. Gordon 56'4. On a Water Spoilt, Abr. de la Pryme 709 



On Sonne Water Spouts. Alex. Stuart 6i7 



4. Pneumatics. 



On the Barometer, &c. Sir Wm. Beeston ... 79 Portable Barometers, Derham 224 



Measure of Snowden Hill by the Barometer, Circular Barometer, Derham 231 



Halley 174 Refraction of the Air, Lowthorp 432 



Refractionof the Air, &c. Bilbery 213 Hook's Marine Barometer, Halley 561 



5. ylcouslics. Music. 



Division of the Monochord, Wallis 240 Experiments and Observations on Sounds. . . . 337 



Imperfect, in an Organ, Wallis 287 On the Ancient Lyre, Dr. Molyneux 712 



On the Ancient Music, Wallis 305 



6. Optics. 



On Gregory's Catoptrics and Dioptrics 77 On Concave Specula, Gray 222 



Microscopical Experiments, Gray 97 Refraction of the Air, Lowthorp 432 



The Water Microscope, Gray 120 Microscopical Observations, Leuwenhoeck . . . 6'02 



A Water Lens and Microscope, Gray \66 On Mr. Wilson's Microscopes 709 



Refraction of the Air, Bilbery 213 



7. Magnetism. 



Some Magnetical Experiments 161 Magnetism of Drills, Ballard 332 



Errors from the Magnet. Variat. Molyn 180 The Mariner's Compass, Wallis 639 



Magnetical Sand, Butterfield ... 3 10 On Magnetism, Dr. Wallis 655 



Class III. Natural History. 



1 . Zoology. 



Animalcules in Water, Harris 89 Animal, in Sem. Masc. Leuwenhoeck 412 



On Eels, Mites, &c. Leuwenhoeck 94 Animal, in Sem. Hum 419 



The Scolopendra Marina, Dr. Molyneux 133 Swammerdam de Apibus 442 



The Long Worm in India, Dr. Lister 137 Monstrous Pigs, &c. Sir J. Floyer 453 



Generation of Eels, B. Allen 196 On Giai ts. Dr. Tho. Molyneux 47 1 



Insects in Ireland, Tho. Molyneux 2l6 Worms in Sheep's Livers, Leuwenhoeck .... 477 



Bones of Elephants, E. Tentzel 218 Animalcula in Ovino, &:c. Bidloo 499 



Caterpillars in Trees, Dr. Garden 233 Worms in the Teeth, Leuwenhoeck 509 



On the Gall-Bee, Benj. Allen 319 Insects on Fruit Trees, the same 519 



On the Death Watch by the same ibid On Ciabs" Eyes, Cha. King ibid 



Maryland Animals. Ja. Peliver 324 Animal, in Sem. Masc. Leuwenhoeck 541 



On several Insects, Mr. Dale 350 Excrescences on Leaves, the same 557 



Lapland Micf, Sir Paul Rycault 36 1 Ins ects in Virginia, J. Banister 565 



Extra-uterine Foetus, Dr. Fern 365 On the Death Watch, Derham 576 



Scolopendra Marina, Dr. Molyneux 368 Animal, in Sem. Masc. Leuwenhoeck 668 



2. Botany. 



Catalogue of Tangier Plants, Spotswoood ... 85 On Rusma and Alcanna 304 



Catalogus Plantarum, Dr. Sloane 103 Basis Botanica, C'hr. L. Welch 307 



Beans at the Orkneys, Dr Sloane ibid On some India Plants, Brown 310 



On Grasses for Hay, Dr. Lister 136 Hisioire des Plantes, Tnurnefort 323 



Almagestum Botan Plukenct 141 On the Tugiw or Aniomnm, Camelli 347 



On Hemlock, &c. J. Ray 1 83 Paradisus Balavus, Dr. Herman 352 



Catalogue of Guinea Plants., Petiver 201 Faba baiicii Ign^lii, Fr. Joannes, . 356 



