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Wimshurst's Electrostatic Machine, c. 1955...
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Gundelach X-Ray Tube, c. 1915...
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Group of 5 Electron Tubes...
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2 Physical Demonstration Instruments, c. 1900...
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French Galvanometer by Carpentier, c. 1880...
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Early German Step Counter, c. 1780...
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Large Mercury Arc Rectifier, c. 1930...
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Sliding Induction Coil based on Design by Du ...
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X-Ray Tube by Leybold, c. 1929...
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Wild T2 Theodolite, c. 1930...
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Irish Circumferentor by Walker & Son, c. 1805...
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7 Wood Boxes for Surveying Instruments, c. 18...
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3 Surveyor's Crosses, 1820-40...
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3 Leveling Instruments...
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Theodolite by Pistor & Martins, c. 1865...
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5 Surveying Instruments...
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French Graphometer by Gondelar, Paris, c. 178...
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La Filotecnica Precision Theodolite, 1915...
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3 Leveling Instruments...
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Schmidt & Haensch Polarimeter, c. 1885...
