Astrometric instruments

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          Astrometric instruments

            17 Descrição arquivística resultados para Astrometric instruments

            Results of observations of the fixed stars made with the Meridian Circle at the Government Observatory , Madras
            IND-IIA-F031-I01 · Item · 1865
            Parte de The fond contains Results of observations of the fixed stars made with the Meridian Circle at the Government Observatory , Madras

            Results of observations of the fixed stars made with the Meridian Circle at the Government Observatory , Madras, in the year 1862, 1863 and 1864 under the Direction of Norman Robert Pogson

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            Results of observations of the fixed stars made with the Meridian circle at the Government Observatory, Madras in the years 1877, 1878 and 1879, Vol. VI
            IND-IIA-F031-I06 · Item · 1877
            Parte de The fond contains Results of observations of the fixed stars made with the Meridian Circle at the Government Observatory , Madras

            Results of observations of the fixed stars made with the Meridian circle at the Government Observatory, Madras in the years 1877, 1878 and 1879.

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            Transit Circle - 6 inch
            IND-IIA-F045 · Fond · 1850

            The item is a 6 inch transit circle. The transit circle is an instrument used to determine the declination of stellar onjects. It consists of a circular scale kept perpendicular to the rotating axis of a telescope tube.

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            Photometer - designed by Dr. Hartmann - 1912
            IND-IIA-F042 · Fond · 1912

            This item was an instrument used for measuring the intensity of a light source. It uses a light-sensing device that is calibrated to express intensity in a standard unit. Some optical elements such as lens etc. are also employed to incerase the sensitivity of the instrument.

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            Letter of John Evershed to Gilbert T. Walker instructing to use the R.A. clamp cords
            IND-IIA-F001-I21 · Item · 15-04-1921
            Parte de Official and personal files of John Evershed with other Directors, famous astronomers and global institutes

            The letter was reply to D.O.No.2440 of the 8th instant, the R.A. clamp at Lahore is intended to be used with two cords and it was explained to Chowla. Further he mentioned about transit instrument and chronograph are extremly shoddy and not in accordance with specification.

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            Results of observations of the fixed stars made with the meridian circle at the Government observatory Madras in the years 1874, 1875 and 1876
            IND-IIA-F031-I05 · Item · 1874
            Parte de The fond contains Results of observations of the fixed stars made with the Meridian Circle at the Government Observatory , Madras

            Results of observations of the fixed stars made with the meridian circle at the Government observatory Madras in the years 1874, 1875 and 1876.

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            Letter from the Deputy Director of the Madras Observatory to the Director of Kodaikanal and Madras Observatories regarding Madras Meridian Circle observations
            IND-IIA-F224-I10 · Item · 22-03-1902
            Parte de Correspondence related to the transfers of various journals, periodicals, handbooks and publications to and from Kodaikanal Observatory from 1900 to 1923

            The letter is from the Deputy Director of the Madras Observatory to the Director of Kodaikanal and Madras Observatories regarding Madras meridian circle observations. It informs that the volumes of the mentioned observations have been forwarded to the Director of Laws Observatory, Missouri.

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