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Reichert Compound Monocular Microscope, c. 18...
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Hartnack Brass Compound Microscope, c. 1875...
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Brass Compound Microscope, c. 1880...
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Brass Compound Microscope, c. 1860...
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Large and Unusually Constructed Microscope, c...
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2 Brass Microscopes, c. 1860...
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English Brass Compound Microscope by William ...
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Rare Four-Draw Refracting Telescope by George...
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4 Physical Demonstration Models, c. 1910...
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100 Volumes "Polytechnisches Journal", c. 183...
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Wimshurst's Electrostatic Machine with Instru...
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7 Electrostatic and Other Demonstration Model...
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Group of Electrostatic Demonstration Models, ...
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Melloni's Thermo Apparatus, c. 1900...
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Ampère Table, c. 1910...
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Double-Barrel Vacuum Pump with Syphon Fountai...
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2 Sparking Pillars by Max Kohl, c. 1910...
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Single-Barrel Vacuum Pump with Glass Sphere, ...
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6 Physical Demonstration Models, c. 1910...
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"Magazin aller neuen Erfindungen, Entdeckunge...
