Hot-air Praxinoscope Ernst Planck, Germany; the hot-air driven metal praxinoscope drum marked E.P, with connecting pulleys to the engine (lacks spirit burner), all mounted on a decoratively-printed paper-covered wood base See: Ernst plank, Catalog-Ausgabe, 1903, p. 87, 95, the hot-air powered Praxinoscope appears as No. 355 in Ernst plank's 1903 catalogue, with the following description: Heissluftmotor No. 334A in Verbindung mit Kinematofor, komplet auf starkes Brett montirt. .a St¦k, the praxinoscope appears with ot