On Screws and Screw Steamers -- Propellers on the Lakes, and the North Carolina

"The journal of the Franklin Institute, for June, contains quotations from the Nautical Magazine, furnishing data respecting the Lake Propellers, International, Buffalo, and Oriental, with remarks from the pen of a valued friend and correspondent. ;'

The journal referred to, although occupying a place on our exchange list, did not come to hand until our pages were full ;

as a consequence, we have no space for enlargement, and can only refer to the subject in such manner as to elicit attention. With regard to screw propulsion on the lakes, however desirable [p. 336] fuller accounts may be in the consumption of fuel, &c., we

have enough to establish the fact, that the screw, as there

applied, with the axis above water, and with an equal amount of

power, is superior to the submerged screw or the paddle-wheel

for speed. As to Captain Whittaker's application, it does not

wholly consist in the emerged screw, but also in direct action

high-pressure engines, placed upon the gunwale of the vessel,

and, we may observe here, that this principle is attracting attention in England. With regard to the wheel of the Iron

Witch, designed by Captain Ericsson, it bore no just analogy

to that used on the Baltic by Captain Whittaker.

[note: article continues on ocean going steamship NORTH CAROLINA