Période

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Worker operating a new radio teletypewriter service which allows for instantaneous transmission of written records without the aid of wires, has been perfected by the experts of the Bureau of Air Comm...
UMG21A22_093

Worker operating a new radio teletypewriter servic...

Doctors from the Medical Association of Mainz conduct an experiment on executed bodies
UMG20B19_101

Doctors from the Medical Association of Mainz cond...

Magic lantern slide circa 1900
UMG20B22_479

Magic lantern slide circa 1900

Magic lantern slide circa 1900
UMG20B22_481

Magic lantern slide circa 1900