Sound travels through air 1088 feet per second. At about ten minutes past six one evening last week the people of Basel, Switzerland heard a dull and distant rumble. It might have been thunder, but the sky was clear. A minute and a half later the same sound reached Cologne, Germany, 250 miles to the north. Between 6:00 and 6:15 that dreadful roar echoed the entire length of the upper Rhine, and had been heard in five countries: Germany, France, Belgium, Luxemburg, Switzerland. It marked the death of 62 people, injury to over 1,000, total destruction of a gas tank, iron...
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