DescriptionUS Pneumatic Dispatch Company, proposed by Alfred Ely Beach, 1868.png
English: The proposed plan for the US Pneumatic Dispatch Company, a pneumatic mail system developed by Alfred Ely Beach in 1868
The Pneumatic Dispatch, with Illustrations: A Compilation of Notices and ..., The American News Company, Nassau Street, 1868, by Alfred Ely Beach
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The Pneumatic Dispatch, with Illustrations: A Compilation of Notices and ..., The American News Company, Nassau Street, 1868, by Alfred Ely Beach
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The proposed plan for the US Pneumatic Dispatch Company, a pneumatic elevated mail system developed by Alfred Ely Beach in 1868
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