This letter was about the foundation stone of planetarium laid by Bappu, MKV in Bangalore.

The book General Astronomy was written by ?Sir Harold Spencer Jones. It was published in ?1922. This book contains 392 pages and covers various topics in astronomy. The topics mentioned in the book are related to ?celestial bodies, planetary motion, telescopes, and the solar system. It also includes information on stars, galaxies, and other astronomical phenomena.

This item was about total solar eclipse of 18th August 1868. At Masulipatnam Pogson detected the hydrogen line emission, with a spectroscope. He saw a bright yellow line near the position of D lines of Sodium. The line originated from hitherto unknown element later termed as helium after the source of earliest detection. Hand coloured sketch of the solar spectrum during the Total Solar Eclipse of 1868. Hand coloured picture of the sun before and after the total solar eclipse 1868.

This item was about the Donohoe medal received by Prof.M.K.Vainu Bappu in commemoration of the discovery of a comet on 2 July 1949.

This item was about the Sunspot spectra taken by John Evershed, where he discovered that there is a radial outflow of gases in a sunspot. This effect is now known as the "Evershed Effect".

The item was about M.K.Vainu Bappu was elected as President of the International Astronomical Union, which has 50 countries as a member.

This letter was about the BARC image convention and the M. K. Vainu Bappu's visit.

This letter seeking a clear spell of an hour in the Sagittarius region and a spectrum of Upsilon Sagittari.

This letter was about spectra for H & K emission and sending a report on the condition of the Zeiss double monochromator.

This letter was about the Tungston Arc Lamp with power supply is being sent through A.Manickam, as instructed by director. He was seeking acknowledgement for the same to make necessary entries in the stock book.