Vernier calipers. An instrument which can be used to take internal, external and depth measurements. This set is accurate to millimetres.

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Size: 4656px × 3777px
Photo credit: © SHEILA TERRY/SCIENCE PHOTO LIBRARY / Alamy / Afripics
License: Licensed
Model Released: No

Keywords: 1803, andrew, carriage, early, england, english, falmouth, feltons, history, london, richard, science, steam, technology, trevethick, vivian, works