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Flexible Boyle's Law

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#204-2 Boyle's Law Apparatus.  A funnel tube and a stopcock tube, connected together by a piece of flexible tubing, run parallel to one another on aluminum rods.  This allows one of the tubes to be raised higher or lower than the other and then it's locked in place.  This unit stands vertical on top of a cast iron base.  Please note, mercury is not included. A heavy weight oil can be used as a substitute for mercury.