, seems tial construc- brated from A to A’. In one arm, J, of the bridge a to place in the hands of the gold prospector a ready tion is especi- resistance, H’, is inserted. A _ telephone’ receiver means of locating ores with rapidity. Mr. Anthony ally adapted forms with a stylus, K, a part of the… … then closed, or in other words, through G @’, wire a, DIAGRAM OF MINERAL DETECTOR CIRCUITS. into the earth and out of the earth at the correspond- ing brass rod, and through the wire a’ to the bridge in Ontario, and, it is claimed, with success. The Brown method consists in utilizing the various…
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