This letter was forwarded to the Director requesting to communicate the date for the photographic plates

In this correspondence list principal astronomical instruments to the Madras Observatory and for Kodaikanal Observatory are mentioned

This reply letter mentions that the reflected ray is deviated approximately 1 degree when the Nephoscope was rotated

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

This fond contains correspondences related to time signals

The fond contain correspondence of the annual reports of scientific works at Kodaikanal

This correspondence is related to half yearly return of Instruments at the Periyakulam Observatory which were in use on 31st March 1900

The fonds contain correspondence regarding various instruments and their reading in the Kodaikanal Observatory

This fond is related to Nizamiah Observatory