Papers of the Board of Longitude

Correspondence and papers regarding general astronomy, pure mathematics and science in general, including John Bradley's observations of the transit of Venus at the Lizard Point in 1769; a letter from F.W. Bessel regarding his 'Fundamenta Astronomica' (1817); Captain W. Forman on refraction; material on the calibration of twilight; papers concerning observations of double stars by J. Herschel and J. South; F.L. Hoffmeister's table for the variation of the right ascension of stars; W.M. Higgins on a hygrometer; W. Bigland's instrument for the solution of trigonometrical problems; E. Broughton's mathematical method intended to replace the use of logarithms; H. Wronski's solution of equations of the fifth degree; T. White on various mathematical problems; F. von Sommer's treatise on the general solution of equations; P.G. Rabagliate on chronology; J. Tulloch on various discoveries relating to nautical astronomy; essays and inventions on improvements to theoretical navigation; Bainbridge's method of keeping a sea journal; R. Thornton's method of solving nautical problems by means of middle latitude; a table of perpetual logarithms with computations; a prospectus for a treatise on practical navigation; observations for the going of a clock and the variations of a compass; P.L. Guinand on the construction of glass for optical purposes; instructions by B. Higgins for making glass for achromatic instruments; W. Foreman on a treatise on optics; E. Sabine on the dip sector and a proposal for experiments at Tenerife on the radiation of heat, density of the atmosphere, etc.; L. Fitzmaurice's proposed method of measuring the heights of mountains using an artificial horizon; G.G. Maria on measuring small distances; J. Turner on clearing observations of refraction; the Duc Duhamel on refraction; and a paper on the properties of air when used as a medium.

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