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Helwan Observatory, Egypt

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Correspondence on mirrors and micrometers, 1912 - 1931

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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,...
Dates: 1912 - 1931
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 mss@lib.cam.ac.uk. Information about opening hours and obtaining a Cambridge University Library reader's ticket is available from the Library's website (www.lib.cam.ac.uk).

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  • Subject: Optical instruments X