Image:Ewing and Humfrey fatigue cracks.JPG

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Public license This image is in the public domain in the United States because it was first published outside the United States prior to January 1, 1923. Other jurisdictions have other rules, and this image might not be in the public domain outside the United States and should not be transferred to Wikimedia Commons unless it can be verified to be in the public domain in its country of first publication. Also note that this image may not be in the public domain in the 9th Circuit if it was published after July 1, 1909.
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Non-free / fair use media rationale for Fatigue (material)
Description

Photograph of Ewing and Humfrey's classic scientific work on the origin of fatigue in metals.
Source

The Fracture of Metals under Repeated Alternations of Stress J. A. Ewing, J. C. W. Humfrey Philosophical Transactions of the Royal Society of London. Series A, Vol. 200, (1903), pp. 241-250
Article

Fatigue (material)
Portion used

Only the photograph is reproduced from an eight-page paper
Low resolution?

The image is no larger, and of no higher quality, than required for its use in articles.
Purpose of use

To illustrate the history of the understanding of metal fatigue and its important highlights.
Replaceable?

It depicts a unique moment in the development of a scientific discipline.
No free-license alternatives are available that convey the same information.
It is used in Wikipedia only for educational purposes and is not used for profit.
Its use on Wikipedia does not compete with the copyright holder.
Its use on Wikipedia is not expected to decrease the value of the copyright to its holder.
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File history

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Date/TimeDimensionsUserComment
current15:39, 29 July 2004342×413 (38 KB)Cutler (Talk | contribs) (Classis historic discovery of role of microscopic cracks in fatigue of metals, ''Philosophical Transactions of the Royal Society'', 1903 {{fairuse}})

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