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The map shows the city plan of Amsterdam, Netherlands, in 1835 with an inset plan of the Environs of Amsterdam. It was drawn by W. B. Clarke and engraved by B. R. Davies. At the bottom of the Map, a comparison of 14 principal buildings in Amsterdam was also given.

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.

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.

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

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.

The fond contains observations notes on Madras meridian observations recorded during 1874-1904 from Madrsa Observatory. The observations concern minor planets, stars, equations for the stars i, j, and c, corrections to observed magnetic declination, the Moon and planets, R. Andromeda, Asia, minor planets, and apparent polar distance of stars.

In this item the Superintending engineer submits a report regarding the progress made on the new observatory buildings in Kodaikanal. It also talks about the special arrangements made by the general superintendent.

This item sanctions Rs.16700 to the current years grant for imperial civil works to meet the expenditures on observatory buildings in Kodaikanal including Departmental charges.

This item sanctions Rs.920 on the construction of three additional godowns for the Director's servants at the Kodaikanal Observatory.

The item comprises of observations made as Madras equatorial Observations of minor planet Frecia of its discovery and observations taken at several periods of time by N.R.Pogson.