MODELS HELP TEACH POLICE STREET LOCATIONS
German Policemen Studying Model Section of Berlin, to Learn Location of Streets, Alarm Boxes and Other Details; the Plan Is Especially Helpful to New Recruits
Accurately constructed models of sections of Berlin and suburbs are used in teaching the police recruits the location of streets, buildings and patrol boxes. They are also of service in explaining traffic regulations and give the candidates a clear idea of the beats they are to travel.
BALL IN TUBE TESTS BRAKES FOR AUTO SAFETY
For a quick and accurate test of the efficiency of the automobile brakes a simple little gauge, introduced in England, has given satisfactory results. It consists chiefly of a glass tube mounted on the instrument board in a fore-and-aft direction and at an angle to the horizontal.. The tube contains a steel ball which normally rests at the bottom of the tube but, when the car is slowed down by the brakes, tends to roll upward. The extent of the movement shows the efficiency of the brakes. One advantage of the gauge is that the measurements do not have to be taken on a level road as moderate gradients do not affect the performance of the indicator in any appreciable degree.
ROTARY TOOTHBRUSH GIVES AID TO DENTAL HYGIENE
Pull a little lever in the handle of a toothbrush and the bristles revolve, saving the hand movements and more thoroughly cleaning between the teeth. the manufacturers assert. New bristle fillings may be quickly inserted when the old ones wear out, the handle being intended to last indefinitely.
Spring-Driven Rotary Toothbrush with Replaceable Bristle Wheels, to Clean Teeth Thoroughly
