. The American artist's manual; . ntly, and burns 3,700 pounds of coalsper day. And a cylinder of 24 inches,which makes 22 strokes of 5 feet each,performs the work of 20 horses, workingconstantly, and burns 5,500 pounds ofcoals. Mr. Boulton has estimated theirperformance in a different manner. Hestates that one bashel of Newcastle coals,containing 84 pounds, will raise 30 mil-lion pounds one foot high; that it willgrind and dress 11 bushels of wheat; thatit will slit and draw into nails 5 cwt. ofiron ; that it will drive 1,000 cotton spin-dles, with all the preparation-machinery,with the prope
. The American artist's manual; . ntly, and burns 3,700 pounds of coalsper day. And a cylinder of 24 inches,which makes 22 strokes of 5 feet each,performs the work of 20 horses, workingconstantly, and burns 5,500 pounds ofcoals. Mr. Boulton has estimated theirperformance in a different manner. Hestates that one bashel of Newcastle coals,containing 84 pounds, will raise 30 mil-lion pounds one foot high; that it willgrind and dress 11 bushels of wheat; thatit will slit and draw into nails 5 cwt. ofiron ; that it will drive 1,000 cotton spin-dles, with all the preparation-machinery,with the proper velocity ; and that theseeffects are equivalent to the work of tenhorses. Mr. Boulton has lately constructed anapparatus tor coining, which moves by animproved steam engine. The so ingeniously constructed, that fourboys of ten or twelve years of age are ca-pable of striking 30,000 guineas in anhour and the machine itself keeps an ac-curate account of the number which isstruck. It is due to the merits of our STE STE men to say, that considerable improve-ments on the steam engine have beenmade in this country. Among the num-ber, we mention with pleasure, the im-provements of Oliver Evans, esq., some ofwhich we present the reader in this following explanation of the Colum-bian Engine we were politely furnishedwith by the patentee. For further infor-mation on iteam engines, we refer thereader to Evanss Treatise on Steam En-gines, a work which abounds with muchpractical and theoretical knowledge. The Columbian Steavi XX. A, the boiler. B, the working cylinder. C, the lever beam. D, the fly-wheel.* E, the condenser. F, the water-pump. G, the supply pump. H, the furnace. I, the chimney flue. K, the safety-valve, which may be load-ed with 100 or 150 lbs. to the inch area ;it will never need more, and it must neverbe fastened down. Operation. The boiler being filled with pure wateras high as the dotted line, and the fireapplied, the smoke e
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