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Correspondence on instruments, 1838 - 1849

Reference Code: GBR/0180/RGO 6/159

Scope and Contents

Correspondence concerning improved instruments, new techniques and inventions, and a proposed planetarium and cometarium. The new inventions include improved sextants and sea horizons; a micrometer; a paper on finding Greenwich Time, complete with a drawing; achromatic eyepieces; an improved quadrant; drawings of eye pieces; a heliotrope; and an illuminating process for telescopes. The correspondents include Sir B. Donkin, Sir C. Wood, Sir H.G. Ward, Sir W. Denison, J. Challis, C.B. Vignoles, B. Peirce, W.H. Smyth, the Earl of Rosse, J.F.W. Herschel, W.R. Dawes, Sir F. Beaufort and A. de Morgan. There are articles from 'The Times' on Sir J. South's telescope; 'The Daily Advertiser' and 'The Liverpool Times' on the Earl of Rosse's Telescope'; and 'The Athaeneum'. There are also catalogues of instruments, observations of Draconis with a zenith tube, and a map of Cardiff.


  • Creation: 1838 - 1849


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