Show RADIO WAVE APPEARS TO TD CAST SHADOW RADIO wave that appears a to A sl fI out from the le leter transmit transmit- transmitter I ter In a 1 straight line and to c cast casta s sa behind an ob ob- obstruction a 1 shadow hadow of silence Is the subject of experiment experiment experiment ment by General Electric engi engineers n ers at South Schenectady d N N. Y This is the meter five wave Va one radio of the shortest with which engineers have been working In their efforts to discover the most efficient means for universal broad- broad casting I Ordinarily according to latest shoot upward theory radio roAlo waves until they strike an d d or electrified elec layer of our ur atmosphere about miles above us By this the waves aves are arc reflected back upon the earth and that tint Is how our receivers catch them In the case of the meter five General Elec Elec- Electric Electric Electric wave ave however the engineers have found that they can tune tunc It In tn only when the receiver re receiver re- re Is In a n direct line of vision with transmitter When they took the receiver cr behind b b a 1 building or orthe orthe orthe the other side of a a. hill they could get et no signal OBSTRUCTIONS IS ERE EREK K SIG As they raised the transmitter from the ground the receiver could be taken farther away but It could receive signals from this transmitter on this wave length only while the theline theline theline line between both transmitter and receiver was unobstructed This has lias led Dr E F F. W W. Al- Al who is In Jn charge chare of this work wort to believe that the ex extremely ex- ex extremely short waves travel In a straight line There may be the possibility however howe that at longer distances than tho those e tried so far the signals may ba be b heard despite obstructions This would prove pro that the five five- meter signals shoot partly upward and are reflected like the larger Jarger waves es while the remainder shoot shootout shootout shootout out In a straight line This will be tested when the re- re receiver re receiver Is taken out at a longer distance from Crom the transmitter One plan is s to place the receiver atop Mt Lebanon near Pittsfield Mass about 40 miles from Schenectady READ mAU BV BY Another Is to put the transmit transmit- transmitter ter atop the Woolworth tower In New York and try to receive Its signals at Schenectady more than miles to the north but still sUIl in a so called direct line of ofIs vis vis- vision vision IsIon ion ion At present the transmitter Is hoisted to the top of a foot 20 pole and Is manipulated from the ground by means of of a pulley string Its meters arc read through a surveyors surveyor's transit r 4 PT d w wi i l f r rY Y Y t This ThI low wave e transmitter has hasto hasto to be hoisted upward to be heard at al a B distance for it can ean be turned turnell in only when seen The Importance of experiment experiment- e experimenting ing within the extremely low wave wave- wavebands wavebands bands may be reamed realized from the fact that a meter five-meter wave 1 Is equal to a n. frequency of CCO cycles a second The Tile C ur- ur meter wave travels at cycles a second In the space spate between four and I five meters there sic ate cycles Celes enough to take care of every radio station now in use amateur commercial government and broadcasting broad broad- broadcasting casting without Interference from overlapping o signals |