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The book "An Elementary Treatise on the Lunar Theory with a Brief Sketch of the History of the Problem" was written by Hugh Godfray. Hugh Godfray (c1821-1877) first published his treatise in 1853, a year after he graduated from St. John’s College. Lunar theory would become central to George Darwin’s work, and he went on to form crucial theories regarding lunar acceleration, earth retardation, the earth-moon system, and the genesis of the moon. It was published in 1987

This office memorandum was sent from the India Meteorological Department to John Evershed about the difficulty in getting the press to set up correctly the type of Seismic records.

The letter was written by E. C. J. Bond who was the officer in-charge No. 18 party (Magnetic), Survey of India to the Director of the Madras and Kodaiknal Observatories, Kodaikanal. He was asking the director to set up the necessary procedures to collect various deflections from the magnetograph in Kodaikanal, including visual and photographic deflections.

This order was from the Superintendent Engineer to transfer funds sanctioned under 45 Imperial Civil to the Director of Kodaikanal Observatory.

The item provides information about the king's message on the peace treaty signing in 1919. This formal act brings to its concluding stages the terrible war that devastated Europe and distressed the World.

Annual Report of the Kodaikanal Observatory for 1922 - 1971. Except for years 1936, 1938, 1953.

Annual Report on the Madras and Kodaikanal Observatories for 1860- 1904. Except the year 1875

Annual Reports on the Madras and Kodaikanal Observatories for 1905- 1921.

The order was on the appointment of P. R. Chidambara Ayer and M. R. Ry. S. Solomon Pillai as Meteorologists at Madras and Deputy Director of Madras Observatory, respectively, effective from 3rd May 1919. The order was issued from Meteorological Department by Senior Superintendent.

The order was on the appointment of Prof. E. B. Ross as Acting Meteorologist, Madras, and Deputy Director of Madras Observatory effective from 1st July 1919. Prof. E. B. Ross was the Professor at Madras Christian College. Meteorological Department issued the order by the Registrar of the Madras Government in 1919.