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Papers concerning instruments not held by the Royal Observatory:
Extract from 'Engineering', 16 December 1887, describing various telescopes by Grubb.
Correspondence concerning telescopes and other instruments, 1888, including the Army and Navy Stores asking for the verification of a sextant; the Horological Institute seeking the verification of a transit circle; Baron Rothschild asking for Royal Observatory staff to go to York to oversee a telescope being constructed; F.H. Stannas asking advice on the purchase of a telescope; the India Survey asking for information on the purchase of levels; A. Appsa asking for information on a camera obscura; and H.B. Chamberlain asking advice about instrument-makers.
Correspondence with the Colonial Office and others concerning the supply of a chronograph for the Hong Kong Observatory, 1889.
Correspondence and papers on Mr Newall's 25-inch telescope at Cambridge, 1889.
Correspondence with various individuals concerning telescopes and instruments, 1889.
Correspondence with various individuals concerning aspects of instrument-construction and where to buy telescopes, 1891.
Correspondence with various individuals concerning telescopes and instruments generally, 1892-1898.
Further correspondence and papers concerning instruments, 1884-1896, including the Revd Perry on spectroscopes, Professor Schuster seeking information on half-prism spectroscopes, and Central News Ltd on 'Bringing the Moon Nearer'.
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