Electric Motor Demonstration with 2, 3, and 4 Pole Armatures Geology Hand-driven Newton's color disc that

Hand-driven Newton's color disc that spins seven painted segments fast enough to merge into apparent white through persistence-of-vision and additive color mixing

with identical volumes across specimens for direct mass-density comparison

step-up/step-down ratios

Built from two counter-rotating foil-sectored plates with a belt drive and a pair of Leyden-jar condensers

Built for wing-spreading during insect mounting

Electric Motor Demonstration with 2, 3, and 4 Pole Armatures Geology Hand-driven Newton's color disc thatCompares 2 , 3 , and 4 pole armature configurations on the same motor frame by swapping interchangeable enameled copper armatures past a permanent bar magnet on a disc commutator.