That was an exciting graph! However, the labeling would be more consistent if it were steam engines, piston engines, and turbine engines OR stationary, ship/barge, train, automobile, and aircraft (I assume you mean airplanes and helicopters and you excluded rockets).
Yeah, I guess it should have been steam engines, automobile engines, and aircraft engines. (The steam engines were partly for trains, partly stationary, partly for other things iirc).
That was an exciting graph! However, the labeling would be more consistent if it were steam engines, piston engines, and turbine engines OR stationary, ship/barge, train, automobile, and aircraft (I assume you mean airplanes and helicopters and you excluded rockets).
Yeah, I guess it should have been steam engines, automobile engines, and aircraft engines. (The steam engines were partly for trains, partly stationary, partly for other things iirc).