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In the spring of 1857 Captain Francis Leopold McClintock, of the Royal Navy, being about to proceed to the Arctic Seas in the ‘Fox’ Yacht in search of the ships which had formed Sir John Franklin’s Expedition, applied to the President and Council of the Royal Society “to afford him such information and instructions as might enable him to make the best use of the opportunity afforded by the voyage for the prosecution of meteorological, magnetical, and other observations.” A committee having been appointed to communicate with Captain McClintock, I, as one of the Members of that Committee, drew up a memorandum respecting the magnetical observations which he might have an opportunity of making, and supplied him with suitable instruments belonging to the Government Establishment under my superintendence. With the sanction of the Committee of the Kew Observatory, Lieutenant W. R. Hobson, R. N., and Captain Allen Young, two of the Officers who proposed to accompany Captain McClintock, were instructed in the use of these instruments at the Kew Observatory.

philosophical transactions of the royal society of london

XXX. Results of hourly observations of the magnetic declination made by Sir Francis Leopold McClintock, and the officers of the yacht ‘Fox,’ at Port, in the Arctic Sea, in the winter of 1858-59; and a comparison of these results with those obtained by Captain Rochfort Maguire, and the Officers of Her Majesty's Ship ʻPloverʼ, in 1852, 1853, and 1854, at Point Barrow