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Correspondence on mirrors and micrometers, 1912 - 1931

Reference Code: GBR/0180/RGO 8/41

Scope and Contents

Correspondence relating to mirrors, micrometers and spectrophotometry, including the following material:

Correspondence with J. Cooke and Sons on a speculum mirror, 1912.

Correspondence with Troughton and Simms on a Duplex micrometer, 1910-1912.

Correspondence with the Cambridge Instrument Co. and the National Physical Laboratory on spectrophotometry, 1926-1930.

Correspondence concerning a new measuring micrometer for the Cookson Plates and a second micrometer, 1931.

Miscellaneous correspondence, 1929-1930, including letters on a prismatic astrolabe and on the sale of a transit instrument to the Helwan Observatory, Egypt.


  • 1912 - 1931

Conditions Governing Access

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 14:56:43+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