The Ericsson Propeller. - This improvement in steam navigation is attracting considerable attention among commercial gentlemen on both sides of our lake. Besides the vessels constructing at this port to be propelled by this invention, we observe by the last British Whig that three vessels are being built at Kingston upon the same principle. from the experiments already made, the complete success of this invention is now hardly considered problematical, ad we may date a new era in our lake commerce with this important improvement.
The following certificate of this Propeller on a recent trial in the harbor of New York, will be read with satisfaction:
April 4, 1841.
To Capt. Ericsson -
Dear Sir - The undersigned having been invited to an excursion down the Harbor this day, in the bark "Clarion," with your steam propeller, deem it a duty to express our entire approbation of her speed and power as a steamer, connected with a sailing ship. at 10:45, we were abreast of Corlies Hook, with a fresh wind from the S.S.W. At 12:48, we were abreast of Fort Richmond, distance 10 1-2 nautical miles, without the aid of canvas, the wind veering directly ahead, the actual speed through the water being by log 7 1-4 knots per hour, or 8 3-8 English miles - the consumption of coal being only 300 lb. per hour. The result of this experiment we deem more extraordinary when it is considered that the cylinders are only 28 inches diameter, 2 feet 8 in. stroke, and the pressure of steam on the boilers, only 7 1-2 lbs. to the square inch. In making a trial in the wind with canvas, we are decidedly of opinion it is of the greatest advantage as practical seamen we recommend it to the commercial community. In conclusion sir, allow us to congratulate you on the consummation of your most sanguine wishes, having achieved all you promised, and more than could be expected from an engine of such small dimensions. We are, respectfully, Sir,
Your friends and most obd't servt's
W.A. Howard, Commanding steam ship Lion