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NACHRICHT
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New improvements in traffic distribution for telephone exchanges
Obligatory equipment of ships with wireless stations
The wireless as an adjunct in the operation of a railroad
Operating railway selectors without batteries
The application of radiotelegraphy to the air ship
The wireless telegraph installation on the steamer "imperator"
Traffic distribution in manual telephone exchanges
The two-tone vibrating transmitter and inductive signaling
Examination of telegraphers for railroad work
Rulings for public wireless service in Germany
A Hughes printing telegraph of large capacity
An experimental study of toll telephone traffic