The fond contain correspondance of M. K. Vainu Bappu with C. V. Raman and mentors, donated by Mrs. Yemuna Bappu to IIA archives.

This item was about cover page of his treatise on Transit of Venus in Urdu.

The “Memorandums of the Imperial Academy of Sciences” publish scientific papers from various disciplines and contribute to academic research. Volume 52, containing the “Canon of Eclipses,” was a valuable resource for astronomy and astrophysics enthusiasts who want to study eclipses in the past and future and make predictions about such events. This publication comes from Theodor Ritter von Oppolzer and was published in 1887. The “Canon of Eclipses” was a comprehensive collection of over 13,000 solar and lunar eclipses, including all total solar and penumbral lunar eclipses between ?1208 B.C.E. and 2161 AD. This book provides detailed information on the timing, duration and location of all eclipses mentioned.

This item was about the discovery of 5 Asteroids (or minor planets as they were known at that time) Asia, Sappho, Sylvia, Camilla and Vera at Madras. The first was named asteroid 'Asia' as it was the first to be discovered by an observer on this continent. This page from Pogson's log book shows the first observations of Asia made on April 18th and 19th 1861.

This item was about the visit of the Prof.S.Chandrasekher and Mrs.Chandrasekher in 1981. Dr.M.K.Vainu Bappu received them and visited the campus which was under the construction at that time.

This item was an instrument used to measure time. A wire rope is wound around a drum which unwinds in a fixed time under gravity. A maker which moves horizontally, marks out the time elapsed on a linear scale. This instrument was used before the invention of the pendulum clock for Astronomical measurements at the Madras Observatory.

Earth, Moon and Planets was a book written by Fred Lawrence Whipple and originally published in 1947. It has 302 pages. The book covers various aspects of the Earth, Moon, and planets within our solar system, like the physical characteristics of these bodies, their orbits, geological features, atmospheric properties, and the processes that shaped them.

The item was about the original glass plate that recorded the "Evershed Effect" in 1909.

The cassette contains a lecture on felicitation of Prof. R. Cowsik

This item was about the photographic coverage of flag hoisting ceremony conducted at Kavakur Observatory.