A Simple Dropping Apparatus for the Victor Meyer Experiment Numerous methods of introducing the weighed sample into the Victor Meyer apparatus have been given in laboratory manuals. Some of these do not consistently work while others require elaborate mechanisms for breaking the capillary bulblet. A simple method which has been quite dependable in our laboratory involves suspending the filled capillary near the top of the tube by a fiue thread which is passed through a glass tube whose upper end has not been firepolisbed. The glass tube is sealed by a pinched rubber tube and the thread severed by rubbing it against the sharp glass edge while the rubber tubing remains in place, causing the capillary bulblet to drop and break upon impact a t the bottom of the tuhe. If multiple runs are to be made, the necessity of dismantling the apparatus to remove the broken capillary hulhlet from the previous run can be eliminated by tying a long fine thread to the capillary bulblet, wrapping the excess around the glass tuhe and bringing the free end to the outside as shown in the diagram. This thread will not interfere with the dropping of the capillary bulhlet and will make retrievaleasy before the next run.
MICHAEL D. MURPHEY
Volume 44, Number 7, July 1967
/
395
