co-jointly

Updated: June 12, 2025

The "double-acting" engine was followed by the "compound" engine, of which Watt says: A new compound engine, or method of connecting together the cylinders and condensers of two or more distinct engines, so as to make the steam which has been employed to press on the piston of the first, act expansively upon the piston of the second, etc., and thus derive an additional power to act either alternately or co-jointly with that of the first cylinder.

Andrew Carnegie - James Watt