Bimetallic Thermostat Switch Model Capacity_17mL Single-degree graduations and a non-magnetic

Single-degree graduations and a non-magnetic plastic case allow this 100mm tangent compass to mount on any tangent galvanometer for precise direction-and-deflection readings

illustrating how current direction and field together produce force

Rolled-rim parallel-sided copper calorimeter at 4 inches tall by 2

Three-bob pendulum set with 1-inch brass

Adjustable mass on one fork shifts its 440Hz pitch by a few hertz

Bimetallic Thermostat Switch Model Capacity_17mL Single-degree graduations and a non-magneticVertical bimetallic strip thermostat model wired through binding posts and adjustable contacts, illustrating how differential thermal expansion makes and breaks a low current circuit.