A oes Dol. 4. No. 38. 9, 1849. —t ed. This is one principle of the wheel, but THE Scientific American. it has another, viz: to present this resisting medium to the force of the water until the THE BEST MECHANICAL PAPER IN THE WORLD. … The contracts for the first 20 miles of the M eting out in full numbers whate’er she de- This wheel is the invention of Mr. A. P. and it also forms a water tight chamber be- road are to be given out on the 30th proximo. Conant of Fitchburg, Mass., which we noti- crees 5 tween it and the top plate…
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