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Precision rheostat with pegs

Model of a centrifugal ventilator

Tuning fork, C2, 1024 s. v.

Collimator lens

Crookes' Radiant Matter Tube with 4 different phosphorescent minerals

Reflecting galvanometer

Thomson's double bridge

Laminated metal stripe, steel and zinc

Bismer decimal balance

Toepler's apparatus for demonstrating how magnetic curves are produced between the poles of an electromagnet