3 SEPTEMBER 1904, Page 25

Messrs. Gale and Polden publish The Semaphore Simplified (6d.) It

consists of a paper of directions with twenty-seven cards, on which are given the various attitudes by which the letters of the alphabet and other symbols are represented. There is also a map on which the alphabet and numeral signs are collectively repre- sented. The use of the system is, of course, well known ; it would not be difficult to contrive a game with it. It is interest- ing to compare it with the Greek methods of signalling as described by Polybius, X. 43-47.