The item is a letter from William Butler to the Director of Kodaikanal and Madras Observatories, Kodaikanal related to the supply of Imperial ordinary plates as requested by the Director of Kodaikanal and Madras Observatories. It is mentioning that that six dozen 5*4 plates were supplied by Messrs. Houghton and Company.

The item is a letter from William Butler, Director General of Stores, to the Director of Kodaikanal and Madras Observatories, stating that the photographic plates requested by the Director of Kodaikanal and Madras Observatories have been supplied to Kodaikanal and Madras Observatories by Imperial Dry Plates Company. The quantity of sent items is also mentioned in the letter.

The item is a letter written by Charles P. Butler, Ag. Director of Kodaikanal and Madras Observatories to John Eliot, the Meteorological Reporter to the Government of India and Director General of Indian Observatories, Simla, in 1903. The letter inquires about sending a personal copy of the administration report to M. Compte de la Baume Pluvinel, who was one of the distinguished astronomical spectroscopists.

The letter was from Charles P. Butler to John Eliot, the Meteorological Reporter to the Government of India and Director General of Indian Observatories, Simla, in 1903 about the broken-down condition of the fencing of rain gauge at Periyakulam station.

The document is a letter asking The Meteorological Reporter to send sunlight cards to Kodaikanal and Madras Observatories.

Charles P. Butler sent this letter to Gilbert T. Walker on installing a spectroheliograph in the Kodaikanal Observatory. The letter was sent from the Royal College of Science, London, on 3rd June 1904.

The letter was written in response to a request from Prof. Birkeland, University of Christiana, for the materials needed for his research. He had requested copies of photograms made on thirty specified days. Gilbert T. Walker signed on behalf of The Meteorological Reporter to the Government of India and the Director General of Indian Observatories.

The letter was sent by an anonymous person to Gilbert T. Walker in 1905. It is mentioning that this letter was sent with two memos and the Madras rainfall tables (containing the daily averages for 80 years). The letter also notes the about the unfavourable weather and the freshly constructed lathe for mechanical work.

This item was about the history of the Kodaikanal Observatory and the events that took place during its 100-year completion celebration. The observatory was established in 1899 as a Solar Physics Observatory and was the new home for all the activities of the Madras Observatory.

Madras and Kodaikanal Reports for the years 1898-1921, except 1899-1900 annual report.