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This fond contains official letters, photographs, and administrative files related to P. R. Chidambara Ayer during the years 1919-1932.

This fond contains official letters related to William Butler from March to November 1908.

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

This font is regarding public works in Kodaikanal Observatory

This font is regarding Instruments used in Kodaikanal Observatory

The fonds contain letters to the Director of Kodaikanal Observatory regarding different constructional plans and estimates.

This fond contains items related to the purchase of books and periodicals from Messrs Grindley &co.

This fond contains items related to John Evershed and about his discoveries.

This item was the painting of Kodaikanal Observatory by an unknown artist in 1909.

The item is a 6 inch transit circle. The transit circle is an instrument used to determine the declination of stellar onjects. It consists of a circular scale kept perpendicular to the rotating axis of a telescope tube.