Soap bubbles, their colors and the forces which mold them. Introd. and notes by Keith Gordon Irwin. Original illus. adapted by Robert Hallock. Boys, C. V. (Charles Vernon), 1855-1944. Surface tension. Bubbles. QC183 .B78 1962 668.12 BOS New York, Crowell [1962] [1962] 1962 Text 280 p. eng Crowell's library of Christmas lectures