-
...
-
-
-
-
-
-
-
-
-
-
FAC Universal Construction System, c. 1960...
-
Audio Oscillator Tuning Fork, c. 1915...
-
4 Physical Demonstration Tubes, c. 1915...
-
2 Reflecting Galvanometers, c. 1915...
-
6 Physical Demonstration Tubes, c. 1915...
-
3 Lecture Theatre Barometers, c. 1920...
-
Crookes Tube with Fluorescent Minerals, c. 19...
-
Electrostatic Demonstration Models, c. 1915...
-
Group of Vacuum Tubes, c. 1915...
-
28 Vacuum Tubes by Leybold, c. 1915...
