It was snowing on the northern peninsula of Michigan one afternoon last week. At the vast deserted quarries of Inland Lime & Stone Co., 8 mi. from Manistique, a small group of menArmy & Navy observers, men from the Bureau of Mines and the Coast & Geodetic Survey, quarrymen, photographers huddled under a line of steel freight cars. No other humans should have been within a mile of them. The occasion was dangerous. The military men said that during a heavy explosion it was best to stand on one's toes with the mouth...
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