Corrigenda

INDEX. Ulmin, English, experiments on it, - 68 Vesuvius, Mount, on a saline substance from it, - 256 Vision, an appendix to Mr. Ware's paper on that subject, - 110 Vitreous humour, its absorption probably the cause of amended vision in old persons, - 42 W Ware, James, Esq. His observations relative to the near and distant sight of different persons, - 31 Wires, on a method of drawing them extremely fine, - 114 Wollaston, William Hyde, M.D. Bakerian lecture, on the elementary particles of certain crystals, - 51 On a method of freezing at a distance, - 71 Method of drawing extremely fine wires, - 114 His description of a single lens micrometer, - 119 CORRIGENDA. Page 175, line 13, for one-fourth—read one-third 177, — 17, for preponderates over that of either the olive oil or phosphorus—read be exceeded by that of the alcohol of sulphur. 246, — 10, after attraction of—add the azote of 23, for produced—read produced,—and dele the comma after portion. 249, — 11, for 261.—read 268. 264, — 18, for the other—read the other of which 268, — 15, for bases,—read basis 273, — 11, for metal, positively electrified—read metal positively electrified. From the Press of W. Bulmer & Co. Cleveland-row, St. James's, London.