A Course of Practical Elementary Biology (Classic Reprint) - Hardcover

Inhaltsangabe

Excerpt from A Course of Practical Elementary Biology

Dipping tubes of glass drawn to a point at one end. Over the other should be drawn a rubber nipple without a hole at its free end. These can be obtained from any chemist. To use the tube squeeze the nipple and place the point of the tube in the liquid close to the small object it is intended to remove. Then release the rubber, and the object will be sucked into the tube.

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