![]() The first mail tube took three minutes to cover the 7,500-foot round-trip journey from the main postal building to the New York Produce Exchange inside, it held a Bible wrapped in an American flag, as well as copies of the U.S. On that date, the United States Post Office Department completed the first test of the city’s pneumatic tube system, which used compressed air to send cylindrical containers filled with mail through a series of underground networks. ![]() ![]() October 7, 1897, was a celebratory day in New York City, unless you happened to be one unfortunate tomcat.
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