Newton's Color Disc on Wooden Base, 13" Lab Equipment and Supplies_Lab Supplies this electromagnet on a 4mm-terminal

this electromagnet on a 4mm-terminal base slots inline with other modules for circuit-driven magnetism work

Dual-range 0-1A and 0-5A moving-coil DC ammeter at plus-or-minus 2

and stirrer

while variable focus produces five parallel beams that a shutter masks selectively

5A standard rheostat with oxidized constantan winding on a vitreous-enameled steel tube

Newton's Color Disc on Wooden Base, 13" Lab Equipment and Supplies_Lab Supplies this electromagnet on a 4mm-terminalWooden base Newton's color disc at 13 inches tall, the hand driven mechanism spinning seven color segments fast enough to merge into apparent white through persistence of vision.