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The book contains the proceedings of Madras Observatory and different government orders from the year 1857 to 1898. It is xerox copy of original books.

Madras Observatory papers by J. Goldingham, by the order of the Government of Madras, in 1826

This fond contains the annual report for the year 1792. It includes the observatory's brief genesis, figures and the observations taken during the same period.

This item was a magnetic compass which was used by M.K.Vainu Bappu during the visit to Kavalur for site survey. The magnetic compass is a tool used for determining direction on the surface of the Earth. It operates by using a magnetic pointer that aligns itself with the Earth's magnetic field. This type of compass is the oldest and most commonly used in various forms of transportation such as aircraft, ships, and land vehicles. The Earth's magnetic field acts as an enormous bar magnet with a North-South field that causes freely moving magnets to take on the same orientation. Although the direction of the Earth's magnetic field is not entirely parallel to the North-South axis of the globe, it is close enough to make an uncorrected compass a reasonably good guide. The inaccuracy, known as variation (or declination), varies in magnitude from point to point on Earth.

Baldwin and Cradock 47 Paternoster publishes the maps under the Superintendence of the Society for the Diffusion of Useful Knowledge. It contains maps of the Islands of the Atlantic, The Antilles, British Island in the West Indies, the Empire of Japan and City plans of Dublin, Athen, Milan, Madrid, Liverpool, Moscow, Genoa etc.,

The book mathematical table by James Pryde chambers in the year 1883. It consists of 500 pages. It was published in 1833

This fond contains medals and awards received by Dr. M. K. Vainu Bappu

This fond encompasses a diverse array, including Indian Marine Surveys, Trigonometrical Surveys, the Inaugural Phase of Topographical Surveys, Route Surveys Beyond the Frontier of British India, the Revenue Survey of India, the Geological Survey of India, the Archaeological Survey of India, Astronomical Observations in India, and the Statistical Survey of India.

The fond contains observations of the meridian circle reductions ( refers to the process of correcting the observed zenith distances measured by a meridian circle instrument ) taken from the Madras Observatory from the year 1862 to 1887. Meridian circle reductions refers to a process in astronomy and celestial navigation that involves observations made with a meridian circle instrument.

The fond contains observations of the meridian circle reductions ( refers to the process of correcting the observed zenith distances measured by a meridian circle instrument ) taken from the Madras Observatory from the year 1862 to 1887. Meridian circle reductions refers to a process in astronomy and celestial navigation that involves observations made with a meridian circle instrument.