A correspondent of the FromJdin Journa l gives the results of the use of the above named different boilers in the U. S. steamer Susquehanna. Taking the estimate of a period extending a few hours over 337 days with the old rising flue boilers, the Susque hanna averaged a speed of 7'25 knots an hour, and consumed :=!,362 Ibs. of coal hourly. With the new boilers (Martin's patent) in use for 44 days, the vessel averaged 8'3 knots per hour, and consumed only 2,752 Ibs. of coal. The gain by the new

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... oilers, he statea, has been 45 per cent . arched socket, which forms a nut to the Operation.-If we suppose the machine to bolt. The screw of the pole is operated by be now drawn along, and a full sheaf or the handle, R, which can release the pole, and gavel of cut grain to be accumulated against, allow it to be taken out in a second, and it is and on, the gate, B, by the revolving platform,