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2B30.15 - Pop Can Collapse
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2B30.25 - Tin Can Collapse
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2B30.30 - Magdeburg Hemispheres
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2B30.30-2 - Flat Plate Magdeburg w/ Professor as Vacuum Pump
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2B30.30x - Export Magdeburg Hemispheres
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2B30.60 - Weight of the Atmosphere
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2B30.70 - Ping Pong Vacuum Cannon
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2B30.u1 - Glass of Water and Card
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2B30.u2 - Rubber Diaphragm on Glass Pipe
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