Progress is fine, but it's gone on for too long.
with apologies to Ogden Nash...
Saturday, August 22, 2015
Sir Joseph Whitworth's "Millionth" measuring machine
From A.J. Lissaman.
Metrology for the Technician.
(London: The English Universities Press Ltd., 1967)
Oxford Junior Encyclopaedia. Volume VIII. Engineering.
Oxford University Press, 1955.
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