This letter was asking question on using telescope mirrors made of cast aluminium or other light metal, which could be cheap and easy to make and also what kind and size of grating, its makers and price to building a solar observatory.

This letter was to inform on M. K. Vainu Bappu's research on Sun. It also mentioned finding a location for the Solar Physics Observatory and also asking Bappu for the present address of Zeiss and of Cox, Hargreaves and Thomson.

This letter was about M. K. Vainu Bappu got sanctioned a scholarship of £400 per annum for 4 years and that he secured admission to Battersea Polytechnic of the University of London for a course in Electrical Engineering.

The letter is from C. V. Ramam, Raman Research Institute to M. K. Vainu Bappu, Nizamiah Observatory asking about using telescope mirrors made of cast aluminium and about diffraction grating as a preliminary to building solar observatory.

The letter is from C. V. Ramam, Raman Research Institute to M. K. Vainu Bappu, Nizamiah Observatory acknowledging his letter on 26 March 1954 and saying he has a suitable location for solar physics observatory on the institution grounds. The letter also ask to let know presen address of Zeiss and Cox.

This letter informs that C. V. Raman received M. K. Vainu Bappu's letter of the 8th instant with much pleasure.

This letter was to inform that C. V. Raman was greatly obliged for M. K. Vainu Bappu's letter of the 8th July 1954. He got one of the Bausch and Lomb catalogues and was very favourably impressed by it and intend to go ahead and purchase one or more of these gratings for his work.

The letter is from C. T. Mullinga, Superintending Engineer, Sixth Circle, to The Director of Observatory, Kodaikanal, forwarding an estimate amounting to Rs.545/- for special repairs to the roof of the spectroheliograph building for his countersignature.

The letter is from C. Mildred, Superintending Engineer, VI Circle, Trichinopoly, to The Director of Kodaikanal & Madras Observatories with reference to The Director's letter to the Sub-Divisional Officer. He has sent three estimates, of which 2 to be returned countersigned and one is to be forwarded to the Government for sanction. The estimates are for the verandah in front of the spectroheliograph building and repairs to the main building.

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.