Description
Built for obstetric instruction
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
Red LED on a demonstration base with 4mm plug connections
and copper supports density
Newton's Color Disc on Wooden Base, 13" Lab Equipment and Supplies_Lab Supplies Built for obstetric instructionWooden 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.
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