Simple Tangent Galvanometer Light & Optics_Reflection & Refraction Plated spring arm with press

Plated spring arm with press knob and a single contact stud

sized for finer-gauge resistance demonstrations and small-scale heating elements where the heavier gauges would over-deliver current

Two-hundred-fifty-gram push-pull balance in an acrylic tubular body

this foam-cut carrying case protects individual bones in molded slots sized to fit most full-size skeleton sets

and density concepts without needing an electrical power source

Simple Tangent Galvanometer Light & Optics_Reflection & Refraction Plated spring arm with pressUsed to measure current by reading compass needle deflection inside a coil, this simple tangent galvanometer turns Oersted's effect into a quantitative ammeter calibrated against Earth's field.