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Papers on instruments, 1875 - 1888

Reference Code: GBR/0180/RGO 6/179

Scope and Contents

Papers on adjustments, tests, trials, performances and purchase of facilities and equipment for the Royal Observatory, including adjustments to the transit circle and its errors, collimation observations, intervals of wires and corrections; removal and installation at Greenwich of the Lassell Reflector; construction of a dome for the 18 foot telescope; performances of spectroscopes, including one drawing; photoheliographs; chronographs; the new sidereal clock; the chronometers the Brockbanks 436, Graham 3 and Dent 1914, 2009 and 2012; and a double image micrometer. The correspondents include J.C. Adams, H.H. Turner, Sir H. Grubb, W. Huggins, Sir F.J.O. Evans, E. Dunkin, Airy and W.H.M. Christie. There is also an article in 'Nature', 1875, concerning a new mechanism for a standard sidereal clock.


  • Creation: 1875 - 1888


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 (


2 archive box(es) (2 boxes)

Language of Materials


Former / Other Reference


Finding aid date

2006-01-06 11:35:06+00:00

Includes index.

Repository Details

Part of the Cambridge University Library Repository

Cambridge University Library
West Road
Cambridge CB3 9DR United Kingdom