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Pendulum clock with seconds pendulum

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