Radio broadcast .. (1922-30)

The March of Radio have shown it possible to utilize the "teletype" in radio communication. Two typewriters, of special construction and operation, are used in such a manner that the operator at the transmitting station, instead of manipulating the ordinary telegraph key to send out code signals, sends with the typewriter keyboard just as though he were actually typewriting. Pressing the a key of the machine, for example, makes the radio transmitter send letter a in code. At the receiving station this code a acts on a set of selective relays in such a way that the a of the receiving typewriter is depressed and written just as though the receiving operator himself had struck the key. Thus, as the transmitting operator works his typewriter keyboard, a typewritten copy of the message is automatically made at the receiving station. The teletype, as the automatic typewriter is called, has been used on land lines for several 3'ears so that its application to radio was expected and was sure to occur when sufficient research had eliminated the troubles first encountered. This new departure in radio will make for more reliability in transmitting orders, according to the Navy Department, as it does away, to a large degree, with the possibility of operator's errors. So far, the teletype has proved successful from plane to ground over a distance of several miles, and the reverse operation, from ground to plane, will probably soon follow. BROADCASTING HEALTH ONE possibility in radio broadcasting which has not been developed nearly as much as is warranted by its importance, is the dissemination of information regarding health; not, for example, the municipal arrangements for guarding against epidemics, but timely personal advice such as a good family physician gives. How many people suffer unnecessarily from severe colds at certain times of the year! Places marked with # operate on mean 'solar time\arvd\ /6o not, have any corwehtiona^orJe'qaNze'd zorve time \ Figures show standard (clocK)Time in Hours Fast (F) or Slow (S)N ISO 155 160 U W LDlNgitude £ Courtesy of General Electric Co. If you mount this chart on a piece of cardboard and cut around the outside circle with a sharp knife and run a pin through the center to form an axle, you may tell the hour in any of the places indicated for a given hour in any other place How many people go off on vacations and attempt such an extraordinary programme of exercising that they come back to their everyday occupation not refreshed, but thoroughly "played out" — what an eloquent phrase, that is!— after their vacation. And how many people get indigestion by eating too rapidly and exercising violently right after eating! Everybody knows that these habits are to be avoided, but it needs more than knowledge to alter the ordinary man's method of living; he generally persists in a certain course until a visit to the doctor, or possibly the hospital, convinces him that he should have brought his habits of living into conformity with the dictates of common sense. If there were periodic radio talks on health and healthy living by reputable physicians, a real good might be accomplished. A physician can help us more by preventive measures when we are well than curative measures after we are "down and out"; yet we practically never