"I've got to investigate," puffed the perspiring corporal; "something must be wrong with the reversible propeller.

Likewise in 1823 Captain Delisle, of the French Engineers, presented a memorial to his Government in which he urged the use of the submerged propeller for the propulsion of steam vessels.

The cheers of the men on the beach had been drowned in the roar of the powerful motors and twin propellers when they left the land and commenced to sweep upward in a graceful curve.

The propeller is Holm's conchoidal propeller.

She was a medium-sized iron steamer, and lay upon the sea in a peculiar fashion, her head being much lower than her stern, the latter elevated so much that I could see part of the blades of her motionless propeller.

He quickly saw that the rear propeller was half buried in the water; and if it turned at all would have to churn things just as though they were in truth a queerly fashioned boat, instead of an airship, intended to mount to lofty heights, and vie with the eagle in his circling above the clouds.

Designed a rotary propeller to be actuated by steam-power consisting of a series of segments of a screw attached to a thin broad hoop supported by arms so twisted as also to form part of a screw.

And the engines, purring softly, told that all had been in readiness for the throwing-in of the clutches that would have set the vast propellers spinning with roaring speed.

When the right opening came he allowed the hydroplane to dip gently down, making sure that there was as little violence as possible in the drop, because of the chance of burying the forward propeller under; or losing his balance, upon which so much depended.

A thinner as well as a lighter plate; a smaller as well as a stronger engine; a larger as well as a less hazardous propeller; and a natural condition of resistance to the action of the elements; will make travel by water a forcible rival to the speed attained upon land, and bring all the distant countries in contact with our civilization, to the profit of all.

The Stevens Battery, the Onondaga, and the Keokuk have independent screw-propellers, which will enable them to turn on their own centres and to manoeuvre much more rapidly and effectively in action than vessels which, having but one propeller, cannot change their direction without changing their position, and are obliged to make a long circuit to change it at all.