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wireless telepathy

Radio sets of the short-wave type have been tinkered and experimented with by magical acts and dealers for the past six years at least. And, with all the effort so far expended, there are very, very few such sets in operation to-day. It can be attributed both to the cost and to the complexities of the electronics which go into the making of such apparatus.

For all of the experimenting has been done in a "shooting at the moon" vein, the idea being to transmit, by ultra short-wave, the human voice of the performer to assistant, or the actual voice of a spectator talking into a concealed microphone on the person of the performer. That this will become possible to the nth degree there is no doubt, for all broadcasting companies now use body sets for the transmitting of spot news events and intimate, on the scene, broadcasts.

However, the main fault has been with the concealment of such apparatus. Whereas a man is able to hide quite a bit in his pockets and around his waist, it is almost an Lnpossibility for a woman to conceal anything under modern dress. In such a case, therefore, it becomes necessary for her to dispense with the usual evening gown and resort to a costume of sorts which allows for space. This immediately puts the use of the apparatus into "show" class and prevents it from being used at impromptu intervals, the very use wherein lies its greatest value for the average worker.

Let us go back quite a few years and look at a transition. The first communication system was by verbal and silent codes. With the advent of the telephone transmitter and receiver, the direct contact system was evolved for the sending of information to the medium on stage, both from offstage quarters in the case of written queries, and from the audience for verbal queries, the performer "dressing Into his low cut vest" the transmitter. All of this necessitated run-down and aisle carpets, stage rugs, and numerous contact spots throughout. Then came the induction system to obtain offstage information, and which was called the last word because it gave .the person on stage much more freedom. This system is being used to-day In the telephone tapping dictographs.

When the wireless came along, it was father to the thought that one might do entirely away with connections and really "send it through the air." At that time a set was devised for this purpose. It was compact and cheaply made. That set still works to-day and is the reason for this article. It never became popular and bandied around because of a simple fact with which experienced operators will agree. No such device of communication (wireless) was practical enough to outdistance verbal or silent signals. Anyone who has watched the Ushers, Zancigs, Sunshines, Mercedes, and a lot of others, will realise the great speed with which they work. It is impossible to duplicate their work, that of transmitting articles and numbers, with the facility allowed by their codes.

When radio replaced the wireless, and shortwave came into being, the thought again popped up. This time, instead of dots and dashes,*the actual voice would be transmitted. And so, the race has been on to produce apparatus which would do that very thing, over a distance of from 50 feet to 20 city blocks.

Let's get down to earth and practicability. I dug up the original wireless hook-up and had it checked by two radio engineers. They all but sneered at such ancient (?) ideas, and, while admitting that it would work, immediately began to elaborate on it by putting in tubes, batteries and other paraphernalia, losing sight entirely of its real value as It stood.

For if two people can transmit a simple buzz between them, without contact and outside of normal hearing distance, and in normal everyday dress, they can run the gamut of all things tel-epathical. We still insist that no such device can beat the speed and possibilities of code work as used by the old timers, but the present generation doesn't seem to be interested in making a life study of verbal and silent systems, and this apparatus can be used immediately for many, many mysterious tests, the limit of which depends only upon the individual performer.

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Contocty

For the drawing room entertainer it is quite perfect. For ordinary distances up to 50 or 75 feet and more, a buzzer of ordinary type will serve as transmitter, excited by a flashlight battery, and both carried in the pockets or on a belt. Down the leg is run a 2-conductor cable of lamp cord connecting with the battery and buzzer as seen at figures A and B in the illustration. For â– aerial and the ground a piece of lamp cord or high tension cable is carried up the back under the coat and down the pant leg as shown. No danger whatever is present from accidental shock etc., with a buzzer, but for the most reliable work in the largest auditoriums, a small spark coil of l/8 to 1/4 Inch spark capacity, should be used. A 1/4 inch spark coil can be run, for Instance, on 1 or 2 dry cells of flashlight battery, so as to keep the power down. In this case extra heavy high tension cable must be used for aerial and ground.

On the transmitter a quenched spark gap is to (turn back one page)

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