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![Handy man's workshop and laboratory . while in the opposite end a small hole is cut bymeans of a file. A glass marble is placedin the tube, and serves as a valve Handy man's workshop and laboratory . while in the opposite end a small hole is cut bymeans of a file. A glass marble is placedin the tube, and serves as a valve](https://c8.alamy.com/comp/2AKXG5Y/handy-mans-workshop-and-laboratory-while-in-the-opposite-end-a-small-hole-is-cut-bymeans-of-a-file-a-glass-marble-is-placedin-the-tube-and-serves-as-a-valve-to-closethe-opening-through-the-cork-theshorter-leg-of-the-siphon-is-run-and-alsoa-small-bent-tube-the-outer-end-of-thelatter-tube-is-placed-in-the-mouth-andon-blowing-into-the-test-tube-the-com-pression-serves-to-close-the-valve-and-atthe-same-time-force-the-liquid-throughthe-siphon-as-soon-as-the-pressure-isrelieved-the-liquid-in-the-vessel-will-flowup-through-the-opening-in-the-test-tubeand-continue-running-off-through-the-s-2AKXG5Y.jpg)