A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
The Poulsen telephonograph
An illustrated description of this apparatus for making a magnetic record of telephone messages on a steel wire or ribbon, which record can reproduce the messages at will. (1200 w.)
The Poulsen telephonograph
An illustrated description of this apparatus for making a magnetic record of telephone messages on a steel wire or ribbon, which record can reproduce the messages at will. (1200 w.)
The Poulsen telephonograph
Der Telephonograph von Poulsen
1900
Article (Journal)
German
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| Engineering Index Backfile | 1900
| Engineering Index Backfile | 1900
| TIBKAT | 1999
Thomas Poulsen - Encountering the enigmatic artist
Online Contents | 2014
TIBKAT | Nachgewiesen 562.1999 -