Keywords: EB1911 Air-Engine - Fig 2. Robinson's form of Striling's Engine.jpg en Robinson's form of Stirling's Air-Engine from Encyclopædia Britannica 1911 1911-01-01 Encyclopædia Britannica 1911 Anonymous; Hugh Chisholm editor other versions PD-old-70-1923 1911 Encyclopædia Britannica Stirling engines |