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This fond contains official letters related to Charles P. Butler during 1903-1904. It includes communications with the Meteorological Reporter, the Government of India and Director General of Indian Observatories, Simla, and the Officer Commanding Royal Engineers, Madras.

This fond contains materials related to C. M. Smith that has general local office materials including letters of all local government and administrations. The letters pertaining to conference proceedings, and correspondences from International Scientists. A large portion of the collection was associated with information on observation.

All letters were related to Poona and Kodaikanal & Madras Observatory. In this fond, there are a total of 37 items.

The fonds contain circulars and letters from the Meteorological Department, Government of India.

This Fond is related to Magnetic Observatory of Kodaikanal

The fond contains 3 books of Astronomical observations made at the honorable the East India Company's Observatory at Madras

Astronomical Observations Madras, 1792-94 was known as the "Annual Report of 1792". The manuscript volume was divided into three parts. The first part gives a detailed description of the observatory building supplemented with 12 hand-coloured figures of the various sections of the building. Figure 1 is the picture of the Madras Observatory. Parts 2 and 3 record the observations taken for the years 1793 and 1794, respectively.

Johannes Kepler's Astronomia Nova, published in 1609, was the oldest book available in the archives. It contains the results of Kepler's ten-year-long investigation of the motion of Mars. Where previous astronomers had relied on geometric models to explain the observed positions of the planets, Kepler discovered physical causes for planetary motion. Before Kepler, Nicolaus Copernicus proposed in 1543 that the Earth and other planets orbit the Sun. Kepler was the first astronomer to prove this conjecture with rigorous scientific arguments. This Volume has 336 pages and is in fairly good condition.

Annual Reports on the Madras and Kodaikanal Observatories for 1905- 1921.

Annual Report on the Madras and Kodaikanal Observatories for 1860- 1904. Except the year 1875