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The order was on the appointment of P. R. Chidambara Ayer and M. R. Ry. S. Solomon Pillai as Meteorologists at Madras and Deputy Director of Madras Observatory, respectively, effective from 3rd May 1919. The order was issued from Meteorological Department by Senior Superintendent.

The order was on the appointment of Prof. E. B. Ross as Acting Meteorologist, Madras, and Deputy Director of Madras Observatory effective from 1st July 1919. Prof. E. B. Ross was the Professor at Madras Christian College. Meteorological Department issued the order by the Registrar of the Madras Government in 1919.

The item was a letter for forwarding a petition submitted by P. R. Chidambaram Ayer to The Secretary to the Government of India, Revenue and Agricultural Department, about his salary. The letter was sent from Kodaikanal to Simla in 1920.

The item was a letter by P. R. Chidambara Ayer to The Registrar of the University of Madras on submitting an MSc.Thesis. The letter was sent in 1929.

The letter was about the submission of MSc. Thesis of P. R. Chidambara Ayer to the Madras University. He is requesting to take immediate action on the further process of thesis submission before the end of November 1930.

The letter certifies that P. R. Chidambara Ayer has been working in Solar Physics Observatory for the last ten years under the supervision of Thomas Royds. It mentioned that certificates related to education and work experience and copies of the thesis on " The distribution of Sun-spot in longitude" were also attached with the letter. It is an experience certificate for approval for submitting P. R. Chidambara Ayer's thesis.

The item was a petition submitted by P. R. Chidambara Ayer to The Secretary to the Government of India, Revenue and Agricultural Department, about his salary. The facts of the case have been stated very clearly in the petition. The letter was sent to The Director General of Observatories and the Director of Kodaikanal and Madras Observatories in 1920.

The item is a no-objection certificate issued by C. Karunakara Menon Esqr, Deputy Tahsildar of Kodaikanal, certified that there is no objection to appointing P. R. Chidambara Ayer as Local Bench Magistrate of Kodaikanal.

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

This item is a photograph of P. R. Chidambara Ayer. The date and other information need to be identified.