Compound engine with both piston and slide valves
<ul><li>Scan from Prof. William Ripper, Sheffield Univ. d.1937 (see source file)</li>
<li><a href="//commons.wikimedia.org/wiki/File:Compound_engine_with_both_piston_and_slide_valves_(Heat_Engines,_1913).jpg" title="File:Compound engine with both piston and slide valves (Heat Engines, 1913).jpg">Original file scan and upload</a>: <a href="//commons.wikimedia.org/wiki/User:Andy_Dingley" title="User:Andy Dingley">Andy Dingley</a> (scanner)</li>
<li>derivative work: <a href="//commons.wikimedia.org/wiki/User:Ariadacapo" title="User:Ariadacapo">Ariadacapo</a> (<a href="//commons.wikimedia.org/wiki/User_talk:Ariadacapo" title="User talk:Ariadacapo"><span class="signature-talk">talk</span></a>)</li></ul>
<ul><li><a href="//commons.wikimedia.org/wiki/File:Compound_engine_with_both_piston_and_slide_valves_(Heat_Engines,_1913).jpg" title="File:Compound engine with both piston and slide valves (Heat Engines, 1913).jpg">Compound_engine_with_both_piston_and_slide_valves_(Heat_Engines,_1913).jpg</a></li></ul>