Soap Bubbles
and the Forces which Mould Them

xyi SOAP-BUBBLES, AND against the ring and blowing a third bubble in real contact with the ring and the outer bubble. This will assist the peeling process. To blow three bubbles, one inside the other two, is more difficult. The following plan I have found to be fairly certain. First blow above the ring a bubble the size of a large orange. Then take a small ring about an inch in diameter, with a straight wire coming down from one side to act as a handle, and after wetting it with the solution, pass it carefully up through the fixed ring so that the small ring is held well inside the bubble. Now pass the pipe, freshly dipped in the solution, into the outer or No. i bubble until it is quite close to the small ring, and begin to blow the No. 2 bubble. This must be started with the pipe almost in contact with the inner ring, as the film on this ring would destroy a bubble that had attained any size. With- draw the pipe, dip it into the liquid, and insert it into the inner bubble, taking care to keep these two bubbles from meeting any- where. Now blow a large gas-bubble, which may rest against the top of No. 2 while it is growing. No. 2 may now rest against the