A clock and a further instrument of measurement. Line block process print.
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- 36610i
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1 print : line block
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The Patent Journal, and inventors magazine. No.70, Saturday, September 25, 1847. Price 6d. Fletcher's improvements in the apparatus for ascertaining the distance which locomotive engines and carriages have travelled on railways.
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Wellcome Collection 36610i
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Location Status Access Closed stores