2i6 Proceedings. 



[Physical and Mathematical Section.] 



January 14th, 1891. 



James Bottomley, B.A., D.Sc, F.C.S., President of the 



Section, in the Chair. 



Mr. Thomson showed some experiments with respect 

 to surface tension, and drew special attention to the 

 following: — (a) In which a bubble was attached to an 

 aluminium wire ring by a thread so as to float in the air as 

 a captive balloon. (^) In which three bubbles were blown 

 on the top of one attached to a wire ring ; on the surfaces 

 of the four coming together very definite outlines showed 

 themselves, e.g"., three planes where the three bubbles rested 

 on the fourth, and three planes where the three bubbles 

 came together, (c) In which, with two bubbles of unequal 

 size, the size of one gradually, by blowing into it, approxi- 

 mated to that of the other, the junction of the two bubbles 

 becoming a flat surface or film. 



