This item concerns about the rare white light flare recorded in hydrogen alpha at Kodaikanal Observatory. These observations were taken on photographic films or plates and digitized for scientific research purposes.

This letter was about the list of photographs of Sun taken on different dates and at particular times mentioned.

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

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

This item was about the high resolution line sketch spectra captured by John evershed during his experiment at Kodaikanal Observatory. While experimenting, he came across to capturing the high resolution spectra of Altair, Nova Aquila, Arcturus in the observatory. In this sketch, he pictured the resolution spectra that he observed as Umbra for high resolution and Penumbra for low resolution.

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".

This letter was to replying Dr.M. K. Vainu Bappu for telling the improvements required in the spectra for H & K emission.

This letter discusses on the predicted formula about the shifts of the solar lines in agreement with the observed values at the red end of the spectrum.

This Letter is from Astronomer Royal to the Director regarding sun photographs for 1911 May 19 and 20

The letter is from Astronomer Royal, Royal Observatory, Greenwich, London, to The Director, Kodaikanal Observatory, Madras, India, requesting to send solar photographs of the mentioned dates as the photographs taken from there are deficient.