Word: subterraneau
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...reporters the "Perry Mineral Indicator," a tripod apparatus fitted with compass, dials and a brass cylinder like the weight from a grandfather clock, suspended by a silken, tubular thread. Perry claimed that the cylinder contained secret ingredients which caused it to oscillate, gyrate, agitate when in the vicinity of subterraneau oil, even thousands of feet in the earth. He, Perry, was the only living soul that could operate the marvelous machine, which he did by bringing a small container filled with crude oil into contact with the silken thread. The principle that would cause the indication of the presence...
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