REFERENCES.--Hooke’s entire paper in Derham’s “Phil. Exp. and Obs.” for 1726, pp. 142–150; _Phil. Trans_, for 1684; for his observations on atmospheric electricity consult Houzeau et Lancaster, “Bibl. Gén.,” Vol. II. p. 166; “Journal des Savants” for April 1846; “The Posthumous Works of Robert Hooke,” London, 1705, p. 424; “Revue Scientifique,” Mars 15, 1902, p. 351; for a complete list of all his works, consult Ward’s “Lives of the Gresham Professors”; for description of his telegraph and reference to Amontons, etc., see _Phil. Mag._, Vol. I. pp. 312–316. =A.D. 1684.=--Sturmy’s “Mariner’s Magazine” for this year, of which a copy can be seen in the library of the British Museum, contains an account of the deviation of the compass and its tendency to give misleading directions on account of local attraction. REFERENCES.--_Chambers’ Journal_, Vol. III. No. 60 for Feb. 24, 1855, p. 132, and Vol. XII. No. 300 for Oct. 1, 1859, p. 246; Capt. Sam. Sturmy’s “Magn. Virtues and Tides,” in _Phil. Trans._, No. 57, p. 726, or “Memoirs of the Roy. Soc.,” Vol. I. p. 134; _Phil. Trans._, abridgments: by Hutton, Vol. II. p. 560, and by Lowthorp, Vol. II. p. 609; “Journal des Sçavans” for 1683, Vol. XI. pp. 267–293. =A.D. 1684.=--In the “Essayes of Natural Experiments made in the Accademia del Cimento” (Englished by Richard Waller), London, 1684, by direction of the Royal Society, there are given, respectively at pp. 53, 123 and 128–132, accounts of the operation of the magnet _in vacuo_, details of several magnetical experiments and experiments touching amber as well as other electrical bodies.