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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.

The letter is a Government Order forwarded to the Director of Kodaikanal & Madras Observatories informing about the sanctioning of Rs.6380 for the construction of a photoheliograph at Kodaikanal Observatory.

The letter is from A. R. deChazal, Executive Engineer, Madura Division to the Superintending Engineer, VI Circle, Trichinopoly returning the estimate of Rs. 1320/- for the re-roofing of Spectroheliograph building.

The letter is from Ag. Collector of Madura to the Director, Kodaikanal & Madras Observatories informing that the order has been given to the Sub-Treasury Officer to pay establishment bill, also ask if there is any omission to comply with the order.

The letter is from C. J. Ussher, Superintending Engineer VI th circle, Trichinopoly, to the Director of Kodaikanal and Madras Observatories forwarding the estimate for constructing the Photo-heliograph building with a dark room and a porch at Kodaikanal asking for countersignature and return.

The letter is from C. J. Ussher, Superintending Engineer VI th circle, Trichinopoly, to the Director of Kodaikanal and Madras Observatories. It is a letter forwarding the fresh plans with an estimate amounting to Rs.14000 for the construction of photo spectroheliograph buildings at Kodaikanal, which has to be countersigned and then submitted to the government for sanction.

The letter is from C. J. Ussher, Superintending Engineer VI th circle, Trichinopoly, to the director of Kodaikanal and Madras observatories. The letter is enclosed with two estimates, namely estimates for the construction of the glazed verandah by the side of the spectrograph and the construction of a porch in front of the large doorway of the laboratory room. He also asks whether the porch is necessary.

The letter is from Charles Michie Smith, Director, Kodaikanal & Madras Observatories, to the Chief Engineer to Government, Chepauk, regarding the erection of a new dome in Kodaikanal Observatory as the existing one was erected 4o years ago and has become hard to use. It says the plans and estimates by the consulting Architect are enclosed.

The letter is from Charles P Butler, Director of Kodaikanal and Madras Observatories, to the Executive Engineer Madura. It is about the order given to ensure that tilestonite should not be put on the roof of the new building for a few months. He also requests that the roof be thickly whitewashed as it will be inconveniently hot otherwise.

The letter is from the Executive Engineer Madura division to the Superintending Engineer VI circle Trichinopoly. It is regarding the work of the spectroheliograph building, requesting to comply with the indent for iron articles as no further progress can be made without it.