Engineering: cross-sections of the hammer designed by John Smeaton for use in iron manufacture. Engraving by W. Lowry after J. Farey the younger.

An iron-founder's forge. Mezzotint by R. Earlom, 1773, after J. Wright, 1772.

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Power hammers

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An iron-founder's forge. Mezzotint by R. Earlom, 1773, after J. Wright, 1772.

Engineering: cross-sections of the hammer designed by John Smeaton for use in iron manufacture. Engraving by W. Lowry after J. Farey the younger.