he gas by the use of lime. The most efficient agent both sulphureted hydrogen and ammonia. These must Aisa circular, revolving blade, with a very thin, sharp, employed for this purpose, we believe, is the oxyd of iron, smooth edge, having a thick circular saw, a little smaller which was the subject… … rites, the foregoing informa- tomatic action from the ma- tion may be very useful. chine. The blade is sharp- ened while in operation by means of the small grind- AVERY’s RAILROAD JornsT. CONROY’S IMPROVED CORK-CUTTER. —We are informed that this stone, C, which grinds the lower side of the blade,…
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