ed at the head of lever, permitting the parts to operate. The inventor swing inward, or toward the expansion collar, permit- the sluice box, an* leading to this is a gang plank for of this device is Mr. Charles Petrie, Office of the Gov- ting such elongation of the chain as will seat the the… … graving. At a convenient point above the lower prongs A NOVEL STEAM TRAP. 8LUICING-THR0UGH A LOAD OF GRAVEL.
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