ar, revolving blade, with a very thin, sharp, employed for this purpose, we believe, is the oxyd of iron, be removed before the gas can be burned. As the gas is smooth edge, having a thick circular saw, a little smaller which was the subject of an English patent issued to Mr. conducted into a… … means of the small grind- Aveky'8 Railroad Joint. CONROY'S IMPROVED CORK-CUTTER. —We are informed that this stone, C, which grinds the lower side of the blade, and by the burnishing steel, D, a considerable amount of tar and ammonia are here con- plan of joining rails, which we illustrated last…