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