REFERENCES.--Priestley, “Hist. and Present State of Elec.,” 1775, pp. 26–42, 55–63; and “A New Universal History of Arts and Sciences,” _Electricity_, Vol. I. p. 460; _Saturday Review_, August 21, 1858, p. 190; Wilson, “Treatise,” 1752, Section IV. prop. i. p. 23, note; _Phil. Trans._, Vol. XXXI. p. 104; Vol. XXXVII. pp. 18, 227, 285, 397; Vol. XXXIX. pp. 16, 166, 220, also the following abridgments: Hutton, Vol. VI. p. 490; Vol. VII. pp. 449, 536, 566; Vol. VIII. pp. 2, 51, 65, 316; Reid and Gray, London, 1733, Vol. VI. pp. 4–17 (Granville Wheler); Eames and Martyn, Vol. VI. part ii. pp. 7, 9, 15, and Part IV. p. 96; Vol. VII. pp. 18–20, 231; John Martyn, Vol. VIII. part ii. pp. 397, 403, 404 (Dr. C. Mortimer); Baddam, Vol. IX, 1745, pp. 145–160, 244, 272, 340, 497; “An Outline of the Sciences of Heat and Electricity,” Thomas Thomson, London, 1830, p. 344; and Thos. Thomson’s “Hist. of the Roy. Soc.,” London, 1812, p. 431; Weld, “Hist. of Roy. Soc.,” Vol. I. p. 466; “A course of lectures on Nat. Philos. and the Mechanical Arts,” by Thos. Young, London, 1807, Vol. II. p. 417; “Hist. de l’Académie des Sciences,” 1733, p. 31; “Jour. Litter.” de 1732, à la Haye, pp. 183, 186, 187, 197; “Hist. de l’Académie Royale de Berlin,” 1746, p. 11; “Journal des Sçavans,” Vol. CXXV for 1741, pp. 134–141, and Vol. CXXVI for 1742, pp. 252–263. For Granville Wheeler, consult _Phil. Trans._, Vol. XLI. pp. 98, 118, also the following abridgments: Hutton, Vol. VIII. pp. 306–320; John Martyn, Vol. VIII. part ii. pp. 406, 412, 415. For Dr. C. Mortimer, consult _Phil. Trans._, Vol. XLI. p. 112 and John Martyn’s abridgments, Vol. VIII. part ii. pp. 404–412. =A.D. 1721.=--Taylor (Brooke), LL.D., F.R.S. (1685–1731), an eminent English mathematician, past Secretary of the Royal Society, and one of the ablest geometers of his time--“the only one who, after the retreat of Newton, could safely enter the lists with the Bernoullis”--publishes his “Experiments on Magnetism” in _Phil. Trans._, No. 368. In order to arrive at a proper determination of the laws of magnetic force, Dr. Taylor--and also Whiston and Hauksbee--according to Sir David Brewster, considered “the deviation of a compass needle from the meridian, produced by the action of a magnet at different distances; and the conclusion which they all drew from their experiments was that the magnetic force was proportional to the sines of half the arcs of deviation, or nearly in the inverse sesqui-duplicate ratio of the distance, or as the square roots of the fifth powers of the distances. Dr. Taylor had already come to the conclusion that the force was different in various magnets, and decreased quicker at great distances than at small ones, an experimental fact, as shown by Sir W. S. Harris, ‘Rud. Mag.,’ Part III. p. 224.”