This image was acquired from
wikimedia. It was marked as Public Domain or CC0 and is free to use. To verify, go to the source and check the information there.
Keywords from Image Description:
John Barber's gas turbinecoloured. John Barber's gas turbine from his patent John Barbers Gasturbine Skize aus seinem Patent UK patent no Obtaining and Applying Motive Power Method of Rising Inflammable Air for the Purposes of Procuring Motion and Facilitating Metallurgical Operations the picture can be found on numerous websites