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Various Surveying Instruments...
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Zeiss Ni 2 Leveling Instrument, c. 1970...
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Russian Compass Theodolite, c. 1920...
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Troughton & Simms Repeating Theodolite with I...
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English Waywiser by Cottam & Hallen, c. 1820...
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Basic Distance Meter (Coincidence Telemeter) ...
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Large Repetition Theodolite with Magnetometer...
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Kern E2-SE Servo Theodolite with Camera for D...
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Russian Circumferentor, 1836...
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2 Theodolites by Stanley, c. 1925...
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Russian Precision Theodolite, 1956...
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Large Induction Coil by Siemens & Halske, c. ...
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4 Interesting Motors...
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Large Geissler Tube with Uranium Glass Flower...
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2 x Radiaver Saint-Gobain, 1937 onwards...
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Early Electric Motor with Sliding Resistor, c...
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"Menlo Park Reminiscences", 1937...
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Large Electromagnetic Motor with Geissler Tub...
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Electro-Magnetic Motor with Rotating Geissler...
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Sundial, 1854...
