piston

It is a very simple plan, and will be perfectly tight; it is by restoring an equilibrium on both sides of the piston.

The water-piston is 10 inches in diameter, drawing and forcing 35 feet perpendicular, equal beam.

When she had finished her up-stroke the steam passed from under the pole on to the top of the piston in the cylinder.

Then he came down from London and found that the piston of his engine was half an inch smaller in diameter than the cylinder.

The steam in ordinary working was shut off when the piston had moved from an eighth to a quarter of its stroke.