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These photographic slides contain compressed pictures of astronomical instruments in Kodaikanal, which are named Tunnel & Spectro, Solar Tunnel, 28-inch Mirror Coelostat, Solar image on the shit, Solar image, Tunnel drive, Solar tower 3rd mirror, II mirror Coelostat.

These photographic slides contain compressed pictures of the set-up of the astronomical instruments like Hydrometer, wind instrument, etc. at the top of Mt. Nimmu.

These Photographic slides contain compressed photos from Our Universe Book.

These photographic slides contain the images of the spectrometer, and Ondrej telescope related to the Optical Science Department of Royal Observatory, Edinburgh.

These photographic slides contains different images of Mcdonald observatory.

These photographic slides contains drawings of porters, telescopes, and other astronomical instruments.

This photographic slide was on the R. A. Building of the Kodaikanal Observatory.

This fond was about pendulum clock used at the Madras Observatory manufactured sometimes in 1786. The clock is now in Kodaikanal Solar Observatory and still in working condition.

This item was about the map of part of the environs of Madras showing the relative positions of the Observatory house station and the guns. This map was made by J.Goldingham who was F.R.S. in Madras Observatory and the map was published in Madras Observatory papers in 1826 on page no. 177.

This item was about the Goldingham working with a Kater's Pendulum hung in front of a haswell clock in the Observatory. The second assistant Thiruvenkatachary, is reading the clock, while the first assistant Srinivasachary, sitting near the 18 ft granite pier, is noting down the reading.