SHEILA TERRY / SCIENCE PHOTO LIBRARY SHEILA TERRY / SCIENCE PHOTO LIBRARY
Steam hammer. Historical artwork of a demonstration of a double-acting steam hammer. A feature of this design is its use of steam to both lift the hammer and drive it downwards. Invented by James Nasmyth (1808-90), a Scottish engineer, this version is patented by Morrison. The hammer was able exert a force equal to one tonne, and it was claimed that it could crack a nut without damaging the kernel.
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