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Astronomical methods and instruments, 1871 - 1873

Reference Code: GBR/0180/RGO 6/173

Scope and Contents

Letters and papers concerning new inventions; trials of existing and improved instruments, especially the transit circle, altazimuth and equatorial telescopes; improved techniques; and adjustments to various instruments. The correspondents include W.H.M. Christie, G.G. Stokes, J. Glaisher, Sir D. Gill, C.V. Walker, G.M. Whipple, W. De La Rue, W. Huggins, A.C. Ranyard, F.A.T. Winnecke, J.T.R. Robinson, A.V. Auwers, A. d'Abbadie, Y. Villarceau, J.R. Hind, W.B. Clarke and Sir W. Thomson. There are pieces on a new sidereal clock; a proposed spectroscope for Greenwich; instrument catalogues; the mechanism of governors for telescopes; recording sunspots; 'Summer's Method' of navigation in 'The Mercantile'; and various ways of finding longitude and determining a ship's place from observed altitudes by Sir W. Thomson in the 'Nautical Magazine'. There are also four photographs of telescopes.


  • Creation: 1871 - 1873


Conditions Governing Access

From the Management Group:

Unless restrictions apply, the collection is open for consultation by researchers using the Manuscripts Reading Room at Cambridge University Library. For further details on conditions governing access please contact Information about opening hours and obtaining a Cambridge University Library reader's ticket is available from the Library's website (


1 archive box(es) (1 box)

Language of Materials