Newton's Color Disc on Wooden Base, 13" Lab Equipment and Supplies_Lab Supplies Classic induction electrophorus with a

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

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

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

2A rheostat with oxidized constantan winding on a 300x44mm vitreous-enameled tube

and copper supports density

Newton's Color Disc on Wooden Base, 13" Lab Equipment and Supplies_Lab Supplies Classic induction electrophorus with aWooden 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.