Newton's Color Disc on Wooden Base, 13" Lab Equipment and Supplies_Lab Supplies Red LED on a demonstration

Red LED on a demonstration base with 4mm plug connections

Classic induction electrophorus with a 6-inch bakelite charge plate and a 3

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

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

Newton's Color Disc on Wooden Base, 13" Lab Equipment and Supplies_Lab Supplies Red LED on a demonstrationWooden 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.