Fifteen years ago a man in Boston started a loose leaf information service for exporters and importers. He received from Spain a request accompanied by return postage in the form of an international reply coupon. This coupon issued under the terms of the Universal Postal Union, had cost 30 centesimos in Spain and was exchanged in the Boston post office for 5¢ in U. S. stamps. The Bostonian was a shrewd man. He knew that with post-War exchange it would cost him just about 1½ U. S. to buy 30 Spanish centesimos...
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