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A B C D E F G H I J K L M N O P Q R S T U V W Z
Ramsden, London, England
Telescope with zinc tube and brass draw tube
Ronchi, Arcetri (Firenze), Italy
Lutz-Edelmann electrometer
Schembor, Vienna Austria
Pneumatic rifle
Solomon, London, England
Magnesium Lamp
Steinheil, Munchen, Germany
Brass telescope
The Cambridge Scientific Instrument Cē LTD , Cambridge, England
Dolezalek quadrant Electrometer
Troughton & Simms, London, England
Brass Telescope with supporting foot
Vaschetti e Grosso, Torino, Italy
Lutz-Edelmann Electrometer
Perucca Electrometer with light source and scale
Weston Instrument Co, Berlino, Germany
Weston voltmeter
Weston Electrical Instrument Corp., Newark, N.Y., U.S.A.
Weston Milliamperometer
Zeiss, Jena, Germany
Abbe-Pulfrich apparatus
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