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2 Small Brass Compound Microscopes...
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2 Berlin Compound Microscopes...
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Carl Zeiss Brass Compound Microscope, c. 1888...
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2 Microscopes by Carl Zeiss...
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Brass Compound Microscope by Hartnack, c. 187...
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"Klöne & Müller" Berlin Compound Microscope...
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2 German Compound Microscopes...
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Leitz Binocular Microscope, c. 1948...
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Brass Microscope by Carl Zeiss, c. 1890...
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2 Brass Compound Microscopes...
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Large Nairne-Type Electrostatic Generator, c....
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Abel's Petroleum Tester, c. 1885...
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Large Wimshurst's Electrostatic Machine, c. 1...
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Large Induction Coil According to Ruhmkorff, ...
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English Brass Plate Sundial, 19th Century...
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Static Charge Demonstration Model...
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Large Geißler Tube, c. 1900...
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7 Electron Tubes...
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"Geißler Tube" Demonstration Model...
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Electric Motor with Rotating Geißler Tubes, c...
