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The letter was sent by an anonymous person to Gilbert T. Walker in 1905. It is mentioning that this letter was sent with two memos and the Madras rainfall tables (containing the daily averages for 80 years). The letter also notes the about the unfavourable weather and the freshly constructed lathe for mechanical work.

The letter was written in response to a request from Prof. Birkeland, University of Christiana, for the materials needed for his research. He had requested copies of photograms made on thirty specified days. Gilbert T. Walker signed on behalf of The Meteorological Reporter to the Government of India and the Director General of Indian Observatories.

The item is a letter from Gilbert T. Walker to the Meteorological Reporter to the Government of Madras regarding the observation forms used at Kodaikanal Observatory. The letter inquires why form F and not form A was utilised to record the observation at the Kodaikanal Observatory.

The letter was sent by Gilbert T. Walker in 1906 from Simla to The Director of the Kodaikanal and Madars Observatories and Superintendent of the Meteorological Observatory, Periyakulam. It was about instructing the observers in Kodaikanal Observatory to send monthly test observations of the maximum and minimum thermometers.

The letter is about sanctioning the purchase of sunshine cards from Lawrence Asylum Press at Madras since the supply of sunshine cards from England was delayed by two years.

The item is a letter to the Director of the Kodaikanal and Madars Observatories to let them know that circular No. 5 of 1905 was annexed to the letter.

The letter was an order from the Director General of Observatories regarding the upcoming telegrams communication. It informs that all the telegram communications of the Telegram Office, Government of India, were advised to forward to O. H. M. S. weather message forms.

The letter was discussing about the simple methods deviced for daily weather telegram

Seven official letters pertaining to Gilbert T. Walker from 1903 to 1912 are included in the fond. This includes correspondence between Gilbert T. Walker and the Director of the Kodaikanal Observatory and the Meteorological Reporter to the Government of Madras.