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Apparatus according to Puluj for determining the mechanical equivalent of heat

Liliput projection lamp according to Sedding

Voltmeter

Precision rheostat with pegs

NELAS laser

Archimedes' pump

Compucorp Alpha 325 Scientist compact computer

Model of a three-phase and two-phase current motor

Aperiodic universal meter for continuous current

Apparatus for demonstrating the electrolysis of water