| 摘要 |
The mercury dosage device consists of a supporting tube in a holder and a capillary tube fitted inside this supporting tube and in which the upper end of the capillary tube has been connected to means for producing combined suction and blowing action. The magnitude of the dose is determined by the position of the lower end of a stem movable longitudinally within the capillary tube. The outer diameter of the stem is smaller than the inner diameter of the capillary tube in such amount that the suction and blowing effect on the mercury is easily produced but that the mercury cannot enter the space between the stem and the capillary tube.
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