-
Winter's Pattern Electrostatic Machine, c. 19...
-
Clarke Magnetic Electrical Machine, c. 1870...
-
German Vacuum Pump, c. 1900...
-
Universal Galvanometer by Zwarg, c. 1875...
-
Vertical Galvanometer by Dr. St?hrer, c. 1880...
-
Siemens & Halske Universal Galvanometer, c. 1...
-
2 Galvanometers and a Dynamometer...
-
Sullivan Universal Galvanometer with Projecti...
-
Mirror Galvanometer by Elliott Brothers, c. 1...
-
Electro-Magnetic Motor with Rotating Geissler...
