Transcriber’s note:
The cover image was created by the transcriber and is placed in the public domain.
THE MAIN POST-OFFICE, PHILADELPHIA.
The
Pneumatic Despatch Tube System
of the
Batcheller Pneumatic Tube Co.
ALSO
FACTS AND GENERAL INFORMATION
RELATING TO PNEUMATIC
DESPATCH TUBES
BY
B. C. BATCHELLER, B.Sc.
MECHANICAL ENGINEER
PHILADELPHIA
PRESS OF J. B. LIPPINCOTT COMPANY
1897
Copyright,
1896,
by
B. C. Batcheller.
| CHAPTER I. | |
|---|---|
A BRIEF HISTORICAL SKETCH. | PAGE |
Early Records | 9 |
Practical beginning of the Art—The London PneumaticTelegraph | 10 |
The Siemens Circuit System | 14 |
Recent Improvements in the London System | 16 |
An Underground Pneumatic Railway for Transportationof Mail | 19 |
The Berlin Pneumatic Telegraph | 20 |
The Paris Pneumatic Telegraph | 22 |
The Pneumatic Telegraph of other Cities | 25 |
Pneumatic Tubes in America | 25 |