This is a circular letter from A.G. Cardew, AG Secretary to Government, regarding adopting standard time for railways and telegraph offices. The standard time in India will be 5.30 hours ahead of Greenwich Mean Time and 9 minutes ahead of Madras time. In Burma, it will be 6.30 hours ahead of Greenwich Mean Time and 5 minutes and 23 seconds earlier than Rangoon time. The change will be introduced at midnight between June 30 and July 1, 1905.

This is a completion certificate for the north dome of the observatory

The letter is from W.B. Gorbon to different departments regarding the revision of the charge on account of upkeep of electrical installations, stating that with effect from 1st April 1912, the charge for repairs shall be assessed at the rate of 5 percent per annum on the capital cost of installations.

This Fond is related to Magnetic Observatory of Kodaikanal

The fonds contain circulars and letters from the Meteorological Department, Government of India.

All letters were related to Poona and Kodaikanal & Madras Observatory. In this fond, there are a total of 37 items.

This fond contains materials related to C. M. Smith that has general local office materials including letters of all local government and administrations. The letters pertaining to conference proceedings, and correspondences from International Scientists. A large portion of the collection was associated with information on observation.

This fond contains official letters related to Charles P. Butler during 1903-1904. It includes communications with the Meteorological Reporter, the Government of India and Director General of Indian Observatories, Simla, and the Officer Commanding Royal Engineers, Madras.

The fond contains correspondence between E. C. J. Bond, the officer-in-charge, No. 18 party (Magnetic), Survey of India, and the Director of the Kodaikanal and Madras Observatories during 1919-1920. The official letters are about the magnetic observations from the Kodaikanal Magnetic Observatory. The observations have been taken from the Kodaikanal Observatory and used to send to The Survey of India office for scientific purposes. This fond consists of 7 letters sufficient to understand the cooperation between The Survey of India and The Kodaikanal Observatory.

Seven official letters pertaining to Gilbert T. Walker from 1903 to 1912 are included in the fond. This includes correspondence between Gilbert T. Walker and the Director of the Kodaikanal Observatory and the Meteorological Reporter to the Government of Madras.