. The railroad and engineering journal . st C, which rises and falls withthi top of the box B B. The end .V of this main leverD is connected by a joint with E, which, in turn, is con-nected with the bent lever F G. The upper end V ofF G \% connected by a small chain,/, to the drum A,which is upon the post ((.which has the needle .1/.1/upon its upper end. From this, it can be seen that any motion of 6, either upor down, is at once communicated to D, and from thencethrough the levers to the drum K which, turning oneway or the other, moves the needle M M. The chain Jis always kept wound taut arou
. The railroad and engineering journal . st C, which rises and falls withthi top of the box B B. The end .V of this main leverD is connected by a joint with E, which, in turn, is con-nected with the bent lever F G. The upper end V ofF G \% connected by a small chain,/, to the drum A,which is upon the post ((.which has the needle .1/.1/upon its upper end. From this, it can be seen that any motion of 6, either upor down, is at once communicated to D, and from thencethrough the levers to the drum K which, turning oneway or the other, moves the needle M M. The chain Jis always kept wound taut around the drum A by meansof the little spring L. The spring N is to raise the lever/? when C is raised, and the weight H is simply, in somedegree, to counterbalance the spring and keep all thelevers working on bearings. The plate or circle .V X,Plate VIII, above which the needle moves, is divided intoequal parts which correspond to the inches on the mer-curial barometer. The length of theseparts, of course, de- PlATZ VII r- \ J t /1 m r^ \.
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Keywords: ., bookcentury1800, bookdecade1880, booksubjectrailroa, bookyear1887
