than on the ordinary machine, and the external appearance of the submarine rider is rather uncanny. As riding under water in an ordinary bicycle suit might be somewhat uncomfortable, a light form of diving suit, helmet and all, has been devised for the use of the submarine rider. The helmet is somewhat lighter than that used by the professional diver, but the arrangement is exactly the same. The rest of the suit is in no way different.     Directly beneath the seat of the submarince bicycle is an oblong metal box or chest which is divided into two equal parts. The larger division is used for the storage of compressed air, while in the lesser division is a valve chest. A small driving-rod copnects with the rear wheel of the machine, and when the rider does not care to operate the submarine bicycle in the usual manner by means of the pedals the pressure of a spring set in the forkhandle opens a valve in the compressed-air chamber and the wheels are set in motion.     Fixed in the forward part of the machine is an air gauge which has two dials, one indicating the amount of air in the cylinders and the other the pressure of the compressed air in the chest beneath the seat.     The method of steering the submarine bicycle is rather odd. There is no rudder nor any provision for one, but when beneath the surface the machine is so evenly balanced that the leaning of the rider to one side or the other causes it to change its plane, and consequently its course.     When it is desires to rise to the surface water is forced from the chambers within the cylinders and the submarine bicycle and its rider slowly rises to the domain of light and

air. It is surely a novel way to seek pleasure in a bicycle beneath the water’s surface, but that it can be a genuine pleasure will become plain to any one who will take sufficient time to give the matter a little study. For instance, what would be more pleasant on a hot summer day than to go down to some resort on a submarine bicycle at whatever distance from the surface the rider may desire. Of course, there will be some difficulty at first steering a proper course, but genius always solves such problems as that, whether on land or water. It would only be a question of a short time until charts of the underwater route to adjacent summer resorts would be on sale.     Again, how pleasant it would be construct a sextuplet submarine bicycle, equip it with a good-sized storage battery, properly protected, and thus have an ample source for a brilliant electric light, that would enable three couples to go bike-riding under water, instead of taking moonlight rides on the surface. The electric light would also guard against any collision that might otherwise take place. The accompanying illustration shows the bicycle just as it will appear when ridden by is submarine diver. The illustration also shows how easy it will be with the new machine for a diver to circulate about a wreck and ascertain its exact position without having to go crawling about slimy decks and run the risk of breaking his air-tube by getting it twisted with the tangled rigging. It is a natural supposition that if society takes to the sub-marine bicycle there will be new styles in diving armor, and that this will furnish a new line of business for the surveyors who cater to the devotees of fashion.