Trains are the original sideways elevator.,(reply>), @Tensho_C horizontalater,(reply>), What about pneumatic elevators? Are they just upscaled vertical pneumatic mail?,(reply>), @Caleb Shoemaker Well no. There is a huge difference if you release the gas in the air or under water. The difference is most noticeable in confined spaces like tiny bathroom in an apartment building without bathroom window.,(reply>), That's a stupid thought because trains are on tracks and elevators are in buildings. Two totally different pieces of technology.,(reply>), Surely a machine has to elevate to be an elevator?.