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The fond contains observations of the meridian circle reductions ( refers to the process of correcting the observed zenith distances measured by a meridian circle instrument ) taken from the Madras Observatory from the year 1862 to 1887. Meridian circle reductions refers to a process in astronomy and celestial navigation that involves observations made with a meridian circle instrument.

The letter is about John Evershed and Kodaikanal to Kashmir Expedition

The fonds contain posts and telegraph between the telegraph department and the Director of Kodaikanal Observatory

This fond is related to prisms from Kodaikanal Observatory

This Fond is related to Magnetic Observatory of Kodaikanal

The fonds contain correspondence regarding various instruments and their reading in the Kodaikanal Observatory

The fond contain correspondence of the annual reports of scientific works at Kodaikanal

This fond contains items related to the Taylor's Star catalogue and Moore's Manual.

The album contains photos related to the Solar Physics Observatory at Kodaikanal during Dr Anil Kumar Das's directorship. It was established in 1899 as a Solar Physics Observatory, and all the activities of the Madras Observatory were shifted to Kodaikanal. The photographs in this album illuminate the critical events in the history of the Kodaikanal Observatory from 1946 to 1955. The visit of eminent scientists and astronomers, official meetings and conferences, celebrations, and farewells and staff of the observatory during the period can be seen in the album.

The album contains archival documents related to John Evershed, a brief biography, photographs, scientific discoveries in astrophysics, drawings, and sketches of observations from the Kodaikanal Solar Physics Observatory. The album starts with a crisp description of the life of John Eveshed. The photographs in the album are based on the following themes: the mechanical workshop and the spectroheliograph, the plaque installed in 1975 in Kodaikanal to commemorate the discovery of the Evershed effect, observatory buildings, and Evershed with the Kodaikanal Observatory staff. In addition, a detailed description related to the Evershed effect is reproduced from bulletin No. XV(1909) of Kodaikanal Observatory, a photo of Halley's comet and a picture of the moon hand-drawn by Evershed, spectra of nova aquilae in 1918, pencil sketches by Evershed on the solar prominences are preserved in this album. Each item is provided with captions.