piessuie, at a speed to the vessel of 10'G knot*, of the screw 14 1 ."), with two knots of flood tule against her, and an estimated slip of tv o knots — making an average of 12 knots an hour. She was abreast of the Noic at lh. 55m. 255., just at high water, and then piocecdcd on her trial to the Mouse Light vessel, 7 4 nautical mi'es distant. In the middle of the trial she was working at 181b. pressure, the screws making 10G l evolutions per minute ; her engine I*,1 *, alt.o made by Mr. Dudgeon, worked beautifully. The Mouse Light was reached at 2h. 27m. 6s. exactly in olm. 43*. She left the Mouse Light for the Kore at 2h. 29m. 28., and reached the latter at 3h. ISni 405. ; she was 15 minutes detained on this passage by tho port engine bearing getting heated, which -\\ ouhl leave her pas sage up, against the lirst of ebb, at 34 minutes. Such results as an avei age of 14 nautical miles per hour fiom a new vessel, with engines not woiked, and nothing running so fiec as a week or two's play would ensure, indicate an onthely new eia in steam navigation ; and those officers and engineers who have so waimly advocated and supported this principle of the application of two screws, have every just leason to bo proud of the triumphant success achieved ou this day. After leaving the Nore, on her passage up the liver, Mr. Dinen subjected her to the following trials : — First tiial. Turning ahead with both engines full speed, then taking abeaung from the shoie, putting the helm haul over, and nothing the time she took to describe aciiclc: three tiials. Mean time occupied in desciibing the circle, 3m. 13s. — Second ti ial. Keeping a couise at lull speod, then easing and stopping oneseiew, keeping the other at full speed, tho helm then being put hard over to note the time she took in describing a circle. Time occupied, 3m 2Gs. — Thud tiial. On a couise to full speed, then backing one screw astern at full speed, Looping tho other at full spood ahead, wjth the helm haul over, to see what time she- would take in desciibing a circle. Time occupied, 2m. .'Ms. In thi-. 