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London: John Murray, 1815.
Rare Phillip Parker King-era almanacOctavo, in original polished calf. Rare copy of the Nautical Almanac for 1818, a fundamental inclusion in the shipboard library of any Admiralty-sponsored voyage. The Almanac was used for reckoning the longitude at sea by the lunar method, and was closely...
London: Printed for Thomas Wright, Mathematical Instrument-Maker… And E. Cushee, Globe-Maker, 1738.
Globes, by the Master of the MintOctavo, with six engraved folding plates; early ink ownership inscription ("John Wadham, his booke July 12th 1762"), armorial bookplate of Belsfield, and a later owner's embossed stamp; a good, crisp copy...
London: D. Henry, November, 1775.
Experimental marine chronometerOctavo, 48 pp., disbound. Complete issue of the Gentleman's Magazine for November 1775 containing an interesting biographical article on John Hutchinson (1674-1737), a natural scientist who, in 1712, invented and built a novel chronometer for ascertaining longitude. The article reads 'Some time...
London: Mark Baskett, 10 January 1765.
£3000 awarded to the widow of Tobias MayerFolio, title page, pp. 367-374, fine. An important Longitude Act, bringing John Harrison closer to reward but insisting the secret workings of his chronometers be revealed. Having outlined the successful sea trials during voyages to Jamaica...
London: Mark Baskett, 1762.
"the Trade and Honour of this Kingdom"Folio, title, pp. 675-678; disbound yet fine. This Act empowers the Commissioners of Longitude power to expend sums up to £2,000 on experimental projects. As such, it significantly expands the scope of the Board to rigorously test plausible proposals...
London: Mark Baskett, 1765.
For payments up to £2000 to worthy contendersFolio, title, pp. 271-274; disbound yet fine. This Act clarifies the process of paying out prize monies, stipulating that the Commissioners of the Board of Longitude are to pass on the particulars of any individual deemed worthy to...