The Pneumatic Despatch Tube System of the Batcheller Pneumatic Tube Co. / Also, Facts and General Information Relating to Pneumatic Despatch Tubes :: B. C. BATCHELLER, B.Sc.

B. C. BATCHELLER, B.Sc.

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Birney C. Batcheller

MECHANICAL ENGINEER

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PHILADELPHIA
PRESS OF J. B. LIPPINCOTT COMPANY
1897

Copyright,
1896,
by
B. C. Batcheller.

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