The photograph of A. A. Narayana Ayyar was taken in 1913 at Solar Physics Observatory, Kodaikanal.

The item is related to the visit of Prof. Sydney Chapman to the Kodaikanal Solar Physics Observatory on 1948 December 31. Sydney Chapman was a British mathematician and geophysicist who contributed to the kinetic theory of gases, solar-terrestrial physics, and the Earth's ozone layer. The photo shows Prof. Chapman and Dr. Anil Kumar Das, the observatory's director, sitting with the other staff. The visit of Prof. Chapman was a noteworthy feature of that year.

The item contains a photograph related to the visit of Russian astronomers to the Kodaikanal Observatory on 19 January 1955. The photo shows four Russian scientists and the staff of the Kodaikanal Observatory.

The item contains a photograph related to the visit of Prof. Viktor Ambartsumian, a Soviet Armenian astrophysicist and science administrator, to the Kodaikanal Observatory during the directorship of Anil Kumar Das. The photo taken in front of the 20-inch dome of the observatory shows Prof. Viktor Ambartsumian, Anil Kumar Das, and the staff.

The item is a graph of light curve obtained during occultation SAO 158687 by Uranus drawn between time and recorder deflection.

The item is a group photo of Dr. Anil Kumar Das, Prof. K. R. Ramanathan, and other employees of the Kodaikanal Observatory with astronomer Royal from Kodaikanal Observatory in 1947. K. R. Ramanathan was an Indian physicist and meteorologist. He was the first Director of the Physical Research Laboratory, Ahmedabad.

This item was about the pencil sketches of solar prominences drawn by John Evershed.

This item was a pencil sketch drawing of Prof.M.K.Vainu Bappu by A.P.Jayarajan

This item was about the sketch of the path of a total solar eclipse that occurred in India in 1868. It depicts the Peninsula of India and shows the track of the Moon's shadow during the eclipse on August 17, 1868. The sketch was created by V.T. & A.K. Johnston in Edinburgh and includes scalar measurements at the bottom.

This letter was about Kodaikanal Observatory's position & surroundings and also talks about scientific celebrities contribution and visits of Dr. Homi Bhabha, Dr. S. Chandrasekhar.