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791 Harbottle Apparatus
The Harbottle helps students understand the meaning of fluid pressure and pressure reduction. A Harbottle is a round, glass, container with a balloon stretched over its opening and a hole in the flattened base that is fitted with a rubber stopper. Students are amazed when the balloon remains inflated inside the bottle even though it is not tied off or sealed.
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805 Magdeburg Hemisphere, Rubber
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