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The fond contain correspondence regarding the Astronomical Observatory at Lahore. The letter is from the Director of Kodaikanal & Madras Observatories to the Registrar, Panjab University, Lahore, giving suggestions for the proposed Astronomical Observatory to be built in Lahore. The letter has suggestions about transit instruments and a 7-inch equatorial telescope. A sketch of the roofing complex is also attached.

This Fond is related to Magnetic Observatory of Kodaikanal

The fond contains correspondence related to the Periyakulam Observatory.

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.

This fond contains correspondences related to clocks in Madras and Kodaikanal Observatory

This font is regarding Instruments used in Kodaikanal Observatory

This fond contains letters and documents related to the meteorology in Kodaikanal during 1898 to 1925

The fond contains correspondence regarding the water pump and pump house in Kodaikanal.

This fond contains correspondences related to time signals

The fond contain correspondence between the Executive Engineer, Superintending Engineer, Director of Kodaikanal & Madras Observatories, and the Director General of Observatories regarding various constructions and alterations in the Kodaikanal Observatory building.