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取两个具支试管，其中一个试管无底。将二试管的支管用一截十几公分长的橡皮导管连接，试管均配上塞子，并用滴定管夹夹住二试管，制成一个类似连通器的装置，此整个装置取名叫氯代试管（见附图）。
Take two test tubes, one of which has no bottom. The two test tubes are connected by a dozen or so centimeter-long rubber conduits. The test tubes are equipped with stoppers, and the two test tubes are clamped with a burette to form a device similar to a connected device. The entire device is called a chlorinated test tube ( see Attachment).