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BB Board.

Visualize how molecules of iron behave when heated with this intriguing device. Two pieces of clear acrylic have BB's to move two dimensionally. Places on your overhead projector and watch them line up in distinctive patterns to demonstrate annealing, hardening and tempering of a metal. With experiments and illustrated instructions.

611-2170

$47.50

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Visualize how molecules of iron behave when heated with this intriguing device. Two pieces of clear acrylic have BB's to move two dimensionally. Places on your overhead projector and watch them line up in distinctive patterns to demonstrate annealing, hardening and tempering of a metal. With experiments and illustrated instructions.

 

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