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Correspondence on optical instruments, 1919 - 1939

Reference Code: GBR/0180/RGO 8/38

Scope and Contents

Miscellaneous correspondence relating to optical instruments:

Correspondence with various engineering and optical instrument firms, 1919-1937, including estimates and accounts. There are sections on a double image star micrometer and diffraction grating for the Yapp 36-inch Refractor, 1936-1937; the grating for the 30-inch reflector, 1923-1925; and a new driving clock and various repairs to the 28-inch equatorial telescope and other instruments, 1919-1923.

Miscellaneous correspondence with scientists and instrument-makers concerning instruments at the Royal Observatory, including their design and the techniques used in their manufacture, 1923-1936.

Correspondence and papers, 1931-1939, regarding the purchase of a slit-less spectrograph from Adam Hilger Ltd of London for the 36-inch Yapp Telescope, including an initial specification and a specification of the spectroscope supplied to the Royal Observatory, Edinburgh; correspondence on the merits of various designs of spectrographs; and copies of accounts rendered by A. Hilger for payment.


  • Creation: 1919 - 1939


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 bundle(s) (1 bundle)

Language of Materials


Former / Other Reference


Finding aid date

2006-04-24 14:56:32+00:00

Includes index.

Repository Details

Part of the Cambridge University Library Repository

Cambridge University Library
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Cambridge CB3 9DR United Kingdom