Microscope Museum

Collection of antique microscopes and other scientific instruments

 

      

Image

Source

Observations from the source

Gallenkamp (1930s)

Slate resistance, type A

Gallenkamp (1930s)

Slate resistance, type B

Gallenkamp (1930s)

Slate resistance, type C

Gallenkamp (1930s)

Slate resistance, type D

Gallenkamp (1930s)

Slate resistance, type B with spindle motion

Gallenkamp (1930s)

Slate resistance, type J

Gallenkamp (1930s)

Slate resistance, type B with middle point tap

Gallenkamp (1930s)

Cross slate ventilated rheostat