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Title: Bidwell's Disk
PIRA: 6F 10.40

Demonstrates: Complimentary colors.
Description: When the disk is rotated correctly the red light will appear green.
Instructions:
Items Used:

Notes: Green color is very faint, if even visible. Math Description: None.

Size: 35" h x 40" w. Condition: Good. Hazard: None.

Schematic: 6F 10.40 Tech Specs: None. Web Links:
History:

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