DOUBLE-ACTING STEAM ENGINE, _continued_.
On the Valves of the Double-acting Steam Engine. -- Original
Valves. -- Spindle Valves. -- Sliding Valve. -- D Valve. --
Four-Way Cock. 108
CHAPTER VII.
The Steam Engine Familiarly Explained and Illustrated With an historical sketch of its invention and progressive improvement; its applications to navigation and railways; with plain axioms for railway speculators · 第 7 / 19 章