Auxillary instruments

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          Auxillary instruments

            21 Archival description results for Auxillary instruments

            2 results directly related Exclude narrower terms
            IND-IIA-F217-I09 · Item · 17-02-1915
            Part of Correspondence regarding meteorology during 1898 to 1925

            The letter is from John Evershed to Messrs Adam Hilger regarding an order for three 60-degree flint prisms of the highest defining quality, two pieces of plane glass highest quality surfaces with one side polished, two pieces of plane parallel blue or green glass of good optical quality transmitting blue light but absorbing violet and ultra-violet. The letter mentions that the bill should be sent to the Director General of Observations in Simla, India.

            Evershed, John
            IND-IIA-F217-I11 · Item · 03-03-1915
            Part of Correspondence regarding meteorology during 1898 to 1925

            The letter is from G. C. Simpson, imperial meteorologist, to John Evershed, Director of Kodaikanal and Madras Observatories, regarding 2 micrometres. It states that there were two Hilger bills as there were two micrometers filled with a new screw coating, and only one of the bills has been paid for.

            Evershed, John
            IND-IIA-F012-I69 · Item · 28-07-1908
            Part of Correspondence of Charles Michie Smith

            This item was reply to letter S.12098, saying that he forwarded one packet of the Seed Gilt Plates out of which two of the plates exposed and show the defects. It also contains the report of the plates by Evershed, who has worked with the plates. In addition the letter has statement of Kodak Company and the mistake made by the Company.

            Smith, Charles Michie