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Papers on instruments, 1895 - 1926

 File
Reference Code: GBR/0180/RGO 7/44

Scope and Contents

1. Spectroscopes

Various memoranda concerning spectroscopes, 1901-1925.

1. 'Spectroscope', 21 September 1901.
2. 'Spectroscope', 23 September 1901.
3. 'Photographic Spectroscope', January 1900.
4. 'Photographic Spectroscope', 14 October 1901.
5. 'Christie's direct-vision "half prism" spectroscope'.
6. 'Wave lengths of spectrum lines'.
7. 'Standard Wavelengths', 1922 (printed).
8. 'Report on Pure Carbon Electrodes', 1925.

2. Photoheliographs

Correspondence and memoranda concerning photoheliographs, 1908-1926, including:

1. 'Relative definition of the Greenwich Photoheliographs'.
2. 'Madras Photoheliograph now at Kodai Kanal Observatory'.
3. 'The Thompson Photoheliograph, Alteration of scale'.
4. 'The Dallmeyer Photoheliograph', 1910.
5. Correspondence with Ross and Co. on adaptors for homocentric lenses.
6. 'Dallmeyer Photoheliograph', 1911.
7. 'Abney Lens'.
8. 'Dallmeyer Lens'.

Correspondence with Sir Howard Grubb concerning a new 4" object glass for the Dallmeyer Photoheliograph, 1911-1912.

3. Time Ball

Notes of days during the period 1895-1909 when the Time Ball could not be raised or dropped due to faults in the mechanism or the weather. There is also correspondence, principally with Troughton and Simms, concerning repairs to the Time Ball.

4. Clocks

List of clocks and chronometers in the possession of the Royal Observatory on 1 January 1909, and where they were placed.

Report, including graphs, on the temperature of the clock room, giving results and comparisons for 3 and 6 month periods, 1911-1912.

Memoranda concerning clocks, including the Krille chronograph and receiving instruments, 1912-1916.

Blueprint (No. 3697M) of the micrometer for the transit instrument, 27 August 1920.







































Dates

  • 1895 - 1926

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 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).

Extent

1 bundle(s) (1 bundle)

Language of Materials

English

Former / Other Reference

C4-6

Finding aid date

2006-03-30 10:40:44+00:00

Includes index.

Creator

Repository Details

Part of the Cambridge University Library Repository

Contact:
Cambridge University Library
West Road
Cambridge CB3 9DR United Kingdom


The UK Archival Thesaurus has been integrated with our catalogue, thanks to Kings College London and the AIM25 project for their support with this.