IT WILL RAISE DOUBLE THE QUANTITY OF WATER.
The fact is self-evident, that in operating the old Engines, to discharge the chamber or
cylinder once, the piston must pass twice through it; an ascending stroke to create a vacuum,
and a descending one to force the water. Half the time is consequently lost. In the rotative,
on the contrary, it is equally evident, that a continued vacuum is created, and a continued
discharge effected, by one and the same operation. As a further illustration of the point in
question, it may be observed,
