Période

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Paul Scherrer in the forties.
UMG24A36_215

Paul Scherrer in the forties.

Paul Scherrer in the forties.
UMG24A35_352

Paul Scherrer in the forties.

Emperor Nicholas conducts the first attempt in Warsaw to carry out telegraphy to St. Petersburg
UMG23A36_178

Emperor Nicholas conducts the first attempt in War...

The Technical University of Hanover
UMG22A45_493

The Technical University of Hanover

Karl Karmarsch
UMG21A08_215

Karl Karmarsch

Washing Machine by Fischer and Co
UMG21A11_095

Washing Machine by Fischer and Co