Terrestrial telescope, 1752.

Terrestrial telescope, 1752.
4 0 c m
actual image size: 26cm x 32cm


When in Bordeaux, France, in 1752, Dr Stephen Demainbray (1710-1782), a science lecturer of the time, bought this telescope from a maker named Costa. It appears to be an ordinary instrument of the period, but in fact it has six lenses which was unusal. A terrestrial telescope is used for observations on land and at sea, the image seen being the right way up.

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© Science Museum / Science & Society Picture Library

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