Soap Bubbles: Their Colours and the Forces Which Mould Them (Romance of Science Series)
London: Society for Promoting Christian Knowledge (SPCK), 1912. New and Englarged Edition, Tenth Thousand. Hardcover. "I do not suppose there is any one in this room who has not occasionally blown a common soap-bubble, and while admiring the perfection of its form, and the marvellous brilliancy of its colours, wondered..... More