THE EDINBURGH PHILOSOPHICAL JOURNAL, EXHIBITING A VIEW OF THE PROGRESS OF DISCOVERY IN NATURAL PHILOSOPHY, PRINTED FOR ARCHIBALD CONSTABLE & CO. EDINBURGH; AND HURST, ROBINSON & CO. LONDON. CA THE EDINBURGH PHILOSOPHICAL JOURNAL. ART. I.-Remarks on the Influence of Magnetism on the Rates of Chronometers. By GEORGE HARVEY, M. G.S., M.A.S., &c. &c. * Communicated by the Author. THE interest that has been latterly displayed respecting the influence of Magnetism on Chronometers, may plead an apology for the following contribution. Such, indeed, is the importance of the subject to the naval and commercial interests of the country, that every attempt to illustrate the effects of permanent and induced magnetism on those delicate machines, may be regarded as useful; since it is only from the accumulation of diversified experimental results, that we can hope fully to comprehend the real nature of the errors produced by this active and powerful agent. The following experiments, part of an extensive course on the Influence of Permanent and Induced Magnetism on the rates of Chronometers, were undertaken principally with a view of ascertaining the effects which the former influence would have on their main springs, in consequence of its having been suspected, during the prosecution of some analogous inquiries, that the rate was subject to considerable fluctuations, according to the positions occupied by this part of the machine, with respect # An account of a remarkable case of Magnetic Intensity of a Chronometer, by Mr Harvey, will be found in the Transactions of the Royal Society of Edinburgh, vol. x. part 1. now in the press.-ED. VOL. X. NO. 19. JAN. 1824. Α |