A Lecture Experiment in Surface Tension

Abstract

HOPING it may be of interest to some of your readers, I venture to send you the following description of a simple experiment on surface tension. A drop of water hanging from the end of a vertical glass tube is regulated in size until it is just on the point of falling away from the tube. On dipping the end of a penholder in ether, and bringing the wet end within a few millimetres from the drop, the latter promptly falls. The drops may be produced and adjusted in the following manner:—