13 FEBRUARY 1915, Page 27

The possible value of periscopes in trench fighting, such as

prevails over the whole western battle-ground in Europe, has been alluded to by more than one military critic. There is an obvious advantage in being able to make observations without running risks from the bullets of the enemy's sharpshooters, who are always waiting the chance of picking off any head that appeals above the parapet of the trench. We have received from the makers a periscope specially designed for this purpose, known as the " }lampoon " Trench Periscope. Except for some roughness in the actual construction, the implement should fit its object excellently. It is very simple, consisting in essentials of no more than a stick with two =nom fixed into it. It is light, and will pack into very small dimensions. Moreover, Rio comparatively cheap, for it coats only 75.6d. (postage: inland, 6d. extra; to the front, la 3d. extra). The address of the waters is 45 Maddox Street, W. Demonstrations of the use of the periscope are given at 25 Hanover Square, W., where it may also be purchased. The example sent to us is already in action in a camp in Surrey, and is, we understand, giving satisfaction to all ranks.