Containing Remarks, with practical Observations, on Tumours of the Gall Bladder, on the Thigh, and the Trachea Arteria; on the Use of the Trepan; of Wounds in the Brain, Exfoliation of the Cranium, Cases of pregnant Women, faulty Anus in new born Children, Abscesses in the Fundament, Stones encysted in the Bladder, Obstructions to the Ejaculation of the Semen, an inverted Eyelid, extraneous Bodies retained in the Oesophagus, discharged through Abscesses; of Bronchotomy, Gastrotomy, native Hare-lips; of the Cæsarean Operation; a new Method of extracting the Stone from the Bladder, on a Cancer of the Breast, an elastic Truss for Hernias, remarkable Hernias of the Stomach, and through the Foramen Ovale. Of a pulmonary Abscess, &c. Translated from the Original, dedicated to the French King. In two Volumes, Octavo. Price 8s. III. A Treatise of Comets, containing, 1. An Explication of all the various Appearances of the late Comet, both in its own Trajectory and the Firmament of fixt Stars, to its setting in the Sun Beams: Illustrated with a Plan of the Earth's and Comet's Orbits. 2. The History of Comets from the earliest Account of those kinds of Planets to the present Time; wherein the Sentiments of the Ancient and Modern Philosophers are occasionally displayed. With Remarks on the Intentional End of Comets, and the Nature and Design of Saturn's Ring. The Distance, Velocity, Size, Solidity, and other Properties of those Bodies considered; and the wonderful Phænomena of their Tails and Atmospheres accounted for. Illustrated also by a Copper-Plate. By G. Smith. Price 1s. IV. The Natural History of Mount Vesuvius, with the Explanation of the various Phenomena that usually attend the Eruptions of this celebrated Volcano. Translated from the original Italian, composed by the Royal Academy of Sciences at Naples, by Order of the King of the Two Sicilies. Price 2s. stitch'd, or 2s. 6d. bound. FOOTNOTES. [1] We suppose every particle of sand, moisture, or smoke, being first attracted and then repelled, carries off with it a portion of the electrical fire; but that the same still subsists in those particles, till they communicate it to something else; and that it is never really destroyed.--So when water is thrown on common fire, we do not imagine the element is thereby destroyed or annihilated, but only dispersed, each particle of water carrying off in vapour its portion of the fire, which it had attracted and attached to itself. [2] Our tubes are made here of green glass, 27 or 30 inches long, as big as can be grasped. Electricity is so much in vogue, that above one hundred of them have been sold within these four months past.