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Show Location of Ores Revealed by Smoke Over the entrance to the principal mine of load company in Arizona hangs a portrait of "Antonio, the Cave Finder," an employee who roam about the underground pan mi fro puffing puff-ing cigarettes, says Popular Mechanic Mechan-ic Magazine. lie keeps cloae watch of the smoke as It drifts away, and , !f he sees It disappearing through tiny breaks In the rock formation, the workings are extended in that direction, which often leads to tnnor caves, rich In ore. Minerals In this region aeon to have been deposited in cavities which lie In an approximately approxi-mately horizontal plane. The mine Is said to have been enlarged by more than half a mile in this manner. Tunnels are driven under the caves nd the ore Is dropped directly into Uie cars that carry It out of the mine. |