(NUMBER 5l. VOLUME 6.] which means a rotary motion is given to the THE Scientific American, endless chain, C, causing the plows to ad- CIRCULATION 16,000. vance in the direction of the arrow. At the … power, but was in a great measure accidental. This operation being continually repeated, the sets of chain wheels, to which chain are fasten- In our country no attempts, so far as we are He states, justly, that the fewer trainson a engine will leave before it a surface of twenty ed the plows, and…
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