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This item contains a note by the chief engineer public works department stating an estimate amounting to Rs.4400 for a steel Framed dome for the Madras Observatory which should be of Sir Howard Grubb standard design.

This letter was about the list of disturbances recorded by Milne's Seismograph at Colaba, Bombay from July to December 1914.

List of disturbances recorded by the Milnes Seismograph at Colaba, Bombay on July to December 1915 where apparatus sued wad Milnes Horizontal Pendilum (E-W)

This item was a list of expenditure and available balance towards solar works at Kashmir

This is a tentative list of subject for papers and discussion there on at the Pan-Pacific Science Congress, Australia, August, 1923

This item is about the speech delivered at the IAU general assembly. Bappu spoke on various aspects of astronomy and the fraternity of astronomers. He greeted the astronomical fraternity for their contributions to the field of astronomy.

This item was about the image of the M.K.Vainu Bappu wandering in the garden.

The CD contains five photos of Manali Kallat Vainu Bappu. In which some are his photos others are as a group. There is one photograph, in which he along with three others stood in front of a temple. The other group photo with foreigners.

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

The item comprises observations made as Madras Equatorial Observations of Comet II; its observations were taken in July 1861 by N.R. Pogson.