Mallet locomotive, a compound steam locomotive invented by Swiss engineer Anatole Mallet.
Fullsize image: https://diqn32j8nouaz.cloudfront.net...e_fullsize.jpgQuote:
Atchison Topeka & Sante Fe Railroad engine 3003, a mallet locomotive on the tracks outside Winslow, Arizona in 1913-14.
https://diqn32j8nouaz.cloudfront.net...locomotive.jpg
More: https://en.wikipedia.org/wiki/Mallet_locomotive
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