7 MARCH 1891, Page 25

Soap - Bubbles, and the Forces which Mould Them. By C. V.

Boys. (S.P.C.K.)—Mr. Boys is careful to state in his preface that his book is intended only for juvenile readers, and is composed of three lectures. In these popular expositions, however, there is enclosed a good deal of genuine scientific knowledge. Indeed, he acknowledges his obligations to various authorities, such as Sir William Thompson, Lord Rayleigh, Savart, and Plateau. Mr. Boys' treatment of the forces " which mould soap-bubbles," and which, as he says, are set in action whenever you pour water from a jug or tea from a teapot, or, indeed, do anything with a liquid, is at once popular and scientific in the best signification of both words. Clear typo and bold illustrations greatly enhance the value of this bright little book.