Soap Bubbles
and the Forces which Mould Them

~~ —■— -—— ---------- ---- — , — 126 SOAP-BUBBLES, AND until it rests upon the outer bubble; not at the bottom, because the heavy ring, keeps that part out of reach, but along a circular line higher up (Fig. 56). I can now drain away the heavy drops of liquid from below bubbles with a pipe, leave them smooth all over. ] now pull the lower Fig- 56. the and and can ring down, squeezing the inner bubble into a shape like an egg clean I Fig- 57- two bubbles inner one is (Fig- 57), or swing it round and round, and then with a little care peel away the ring from off the bubble, and leave them both perfectly round every way (Fig. 58). I can draw out the air from the outer bubble till you can hardly see between them, and then blow in, and the harder I blow, the more is it evident that the are not touching at all; the now spinning round and round