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

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

This is a letter from Charles. P. Butler, Ag: Director, Kodaikanal & Madras Observatories to Executive Engineer Madura regarding some construction needs at the Solar Physics Observatory, like a permanent building to hold the 4-inch photoheliograph, a glazed verandah for keeping the north-western side of the observatory dry, an open verandah for the Bookbinder's shed and quarters for the writer of the observatory, on which the details will be given later when the decision is finalised.

This letter was about replying to C. M. Smith opinion on uselessness of a table in the solar article for the Monthly Weather Review.

The letter was a reply to Evershed saying that there will be no difficulty in dealing with the 26 inch originals and requesting to provide necessary information.

The letter discusses on the H and K wave-lengths and discusses the recent results that confirm the earlier results, exactly in the case of H and with a difference of 001 with K.

This letter was with reference to the telegram where mean areas giving better gauge of prominence activity than mean extent are discussed. It also encloses a table of mean areas from 1890 to 1921.