30 Jan 1877
Page 1
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This newspaper page contains 4 articles. Subscribers can read the full text of each article.
Newspaper
Butte Miner
Location
Butte, Montana, United States of America
Date
Jan 30, 1877
Page
1
Article explains a patented mining machine by Geo W Crafton that uses hydraulic force to raise auriferous earth from gravel beds and separate gold in a continuous operation. The device features ground sections, a wooden spout, a flume, a grizzly, an adjustable elbow, and a sluice, designed to mine deeper deposits efficiently.
The text outlines a hydraulically driven spout with an enlarged ground section forming an interior chamber around the nozzle to mix material with water. It notes wear on sections and the benefit of replacing worn lower halves, plus a wooden-block wear-receiving recess. It also discusses the difficulty of drawing tailings from mines and cites Mr. Cranston’s gold-saving fume as aiding material raising and metal recovery in one operation.
The article reviews fire-setting as an ancient mining technique used in Europe including the Ram melsberg and Kongsberg mines. It covers how wood piles are burned to fracture rock, fuel considerations, ventilation dangers, and costly accidents versus blasting progress. It notes varying deposits and the need for careful evaluation before use.
London Journal reports Br. R. Gardner of Liverpool has designed a simpler stronger rock and ore crusher. His frame uses a rectangular chamber with a movable jaw driven by a shaft eccentric, enabling vertical and horizontal jaw motion. The device handles slag chemicals and rocks and features replaceable wear surfaces. Also noted is a 1874 incident where Lt. Spencer was dismissed for denouncing his Colonel amid post gossip, with Congress considering reinstatement.
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