Principal Observatory, Siam. Illustrating the observatory at Chulai Point, in modern day Thailand, used to examine the Transit of Venus in November 1875. From 'The Illustrated London News ' Volume 66 (London, 19 June 1875).

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Principal Observatory, Siam. Illustrating the observatory at Chulai Point, in modern day Thailand, used to examine the Transit of Venus in November 1875. From 'The Illustrated London News ' Volume 66 (London, 19 June 1875).

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Photo credit: © World History Archive / Alamy / Afripics
License: Licensed
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