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GEORGE BERNARD / SCIENCE PHOTO LIBRARY GEORGE BERNARD / SCIENCE PHOTO LIBRARY
Great Melbourne Telescope, Melbourne, Australia, 1868 artwork. This reflector telescope, completed in 1868, had a mirror 122 centimetres in diameter with a focal length of 9. 3 metres. Its equatorial mount moved it to compensate for the rotation of the Earth and follow an object across the sky. The skeleton tube framework (6. 4 metres in length) had spiral strips and rings for increased strength and freedom from tremor. The pulleys at the observer's end moved a mirror at the other end, to focus the image. It was used to observe the skies of the Southern Hemisphere. In the 1940s it was broken up to provide parts for other telescopes. Artwork published in the London Illustrated News.
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