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4 Physical Demonstration Tubes, c. 1915...
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2 Reflecting Galvanometers, c. 1915...
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6 Physical Demonstration Tubes, c. 1915...
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3 Lecture Theatre Barometers, c. 1920...
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Crookes Tube with Fluorescent Minerals, c. 19...
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Electrostatic Demonstration Models, c. 1915...
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Group of Vacuum Tubes, c. 1915...
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28 Vacuum Tubes by Leybold, c. 1915...
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2 Vacuum Tubes with Phosphorescent Material, ...
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French Experiment Box for Demonstrating Elect...
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Six-Part "Pile de Grenet" Battery, c. 1910...
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Geissler Tube with Uranium Glass Flower, c. 1...
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Device for Demonstrating the Rotation of a Co...
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Electro-Physical Demonstration Models, c. 191...
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3 Electro-Physical Demonstration Models, c. 1...
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"Magazin aller neuen Erfindungen, Entdeckunge...
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Collector Literature: Scientific Instruments,...
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2 Volumes of Le Mécanicien Moderne, c. 1910...
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Physical and Technical Reference Books...
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Demonstration Apparatus with 2 Induction Coil...
