This item was about the description of minor planet named as 87 Sylvia. This was discovered on 16th May 1866 by N.R.Pogson. The comparison stars employed have all been observed with the Meridian Circle of the Madras Observatory.

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

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

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.

Madras and Kodaikanal Reports for the years 1898-1921, except 1899-1900 annual report.

This item was about the image of the M.K.Vainu Bappu wandering in the garden.

This letter was sent to Dr.M. K. Vainu Bappu on Hari Om Ashram Trust Awards in Science saying that he was selected for Meghnad Saha Award for the year 1977. The award is of the value of Rs.10,000/-.

This letter was about the performance of the Newton spectrograph, prepatory work and observations on sky.

This letter was about admiring on the achievements of Sastry for his professional status at the institute.

This letter was about conversation between Sastry and Bappu on Gauribidanur array as compared to the Clark Lake Radio Observatory.