<p>Animated schematic of the differences between a vacuum and high pressure steam engine. Drawn by me using XaraX <a href="//commons.wikimedia.org/wiki/User:Emoscopes" title="User:Emoscopes">Emoscopes</a> 22:31, 3 March 2006 (UTC)
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--<a href="//commons.wikimedia.org/wiki/Special:Contributions/88.64.14.49" title="Special:Contributions/88.64.14.49">88.64.14.49</a> 09:40, 29 May 2013 (UTC)
No machine-readable author provided. <a href="//commons.wikimedia.org/wiki/User:Emoscopes" title="User:Emoscopes">Emoscopes</a> assumed (based on copyright claims).
CC BY 2.5
No machine-readable source provided. Own work assumed (based on copyright claims).