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It was fortunate, in the present state of the weather, that the fiftieth course was in a sheltered spot, within the reach of the tackle of the winch-machine upon the bridge; a few stones were stowed upon the bridge itself, and the remainder upon the building, which kept the artificers at work.
About half-past eight o'clock in the morning a derrick, or mast, thirty feet high, was erected, and properly supported with guy-ropes for suspending the block for raising the first principal beam of the beacon, and a winch-machine was bolted down to the rock for working the purchase-tackle. The necessary blocks and tackle were likewise laid to hand and properly arranged.
A chain-tackle was suspended over a pulley from the cross-beam connecting the tops of the kingposts of the bridge, which was worked by a winch-machine with wheel, pinion, and barrel, round which last the chain was wound. This apparatus was placed on the beacon side of the bridge, at the distance of about twelve feet from the cross-beam and pulley in the middle of the bridge.
A chain-tackle was suspended over a pulley from the cross-beam connecting the tops of the kingposts of the bridge, which was worked by a winch-machine with wheel, pinion, and barrel, round which last the chain was wound. This apparatus was placed on the beacon side of the bridge, at the distance of about twelve feet from the cross-beam and pulley in the middle of the bridge.
It was fortunate, in the present state of the weather, that the fiftieth course was in a sheltered spot, within the reach of the tackle of the winch-machine upon the bridge; a few stones were stowed upon the bridge itself, and the remainder upon the building, which kept the artificers at work.
About half-past eight o'clock in the morning a derrick, or mast, thirty feet high, was erected, and properly supported with guy-ropes for suspending the block for raising the first principal beam of the beacon, and a winch-machine was bolted down to the rock for working the purchase-tackle. The necessary blocks and tackle were likewise laid to hand and properly arranged.
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