Jesse Ramsden
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What links here
Edward Troughton
Troughton & Simms
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Richard Sheepshanks
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Stephen Groombridge
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William Simms (instrument maker)
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James South
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1809 in science
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John Pond
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Troughton
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Theodolite
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Kensal Green Cemetery
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Cumbria
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Nevil Maskelyne
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