The letter critisizes on the Royds's MS of bulletin no.48 in seven distiguished points.

This letter was a reply to Thomas Royds criticizing a note on MS of bulletin 49.

This letter was a reference to John Evershed letter that discusses regarding the spectral lines

The letter was to bring notice on sending a separate cover a copy of the Chapter XIV of Sulaiman's paper on persual.

This fond contains official letters, photographs, and administrative files related to P. R. Chidambara Ayer during the years 1919-1932.

The item was a letter by P. R. Chidambara Ayer to The Registrar of the University of Madras on submitting an MSc.Thesis. The letter was sent in 1929.

This fond contains official letters related to William Butler from March to November 1908.

The item was about M. K. V M. K. Vainu Bappu's critical condition at Munich after kidney failure and heart by-pass surgery at Munich's University Clinic. They had been fighting to save M. K. Vainu Bappu's life.

This item was about the interview of Dr. David Milan conducted by experts has garnered significant. During the interview, the experts probed Dr. Milan about his research and also questioned him about the current state and future of astronomy.

This item was about the program on the occasion of Dr. K. S. Krishnan's birth anniversary, the National Institute of Advanced Studies organized a program. The chief guest for the event was the President of India, Mr. R. K. Narayanan. He spoke about Dr. Krishnan and mentioned that he was not only a great scientist but much more than that.