Material concerning eclipses and calculations for longitude. The volume begins with the 1869 eclipse and includes a photograph, Professor Young's report and correspondence with L. Swift and B. Pierce. This is followed by material on the 1870 eclipse and computations for future eclipses in 1878, 1905, 1914 and 1954, and in 430, 674, 671 and 688 BC; maps for the 1875 eclipses; an article on future eclipses from 'The Times', 7 September 1871; and a piece on the 1724 total eclipse. There are six photographs taken at Madras for the 1872 annular eclipse, with N.R. Pogson's report and J.R. Hind's reconstructions of the eclipses of 1030, 1605, 1652, 1715, 1724 and 1737. The papers also include observations of eclipses in 1873 and 1874, including E.J. Stone's Cape of Good Hope report, a newspaper report and diagrams; material concerning two eclipses of 1875, including an article in 'The Athenaeum' for the first eclipse and a projection of Cairo for the second one; and a letter in Italian by G. Coloia on the 1239 eclipse. The material on longitude consists of a report on the longitude of the Hutt Observatory, New Zealand, 1871; determinations of the longitude of Jalk and Bampur, Baluchistan, Pakistan; and various requests for the longitudes of British towns.