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surfaces of weakness

Plate 9, Fig. 11. Fatigue of Swedish iron by reversals of a stress of 12.4 tons per sq. inch. Magnification 1000 diameters.
after 10,000 reversals.
(cropped from border, squared)
illustrating J. A. Ewing (1855-1935 * ) and J. C. W. Humfrey. “The Fracture of Metals under Repeated Alterations of Stress.” Philosophical Transactions : Mathematical and physical sciences. Series A. 200 (1903) : 241-250, followed by four plates
Cornell copy, digitized August 20, 2013

closer to the wrist

metals fail
crystals cleave
somewhat like
flattening the sharps, and
sharpening the flats

ex John Nevil Maskelyne. 'Sharps and Flats' : A Complete Revelation of The Secrets of Chance and Skill (1894) : 330
by way of todayʼs chance reading in Ricky Jay, his Celebrations of Curious Characters (2011) : 49

epigram ex p 246

9 November 2014

tags: gpoy; hands; lines; metallurgy; ruination
J. A. Ewing; J. C. W. Humfrey; Ricky Jay; J. N. Maskelyne