OPERATION WITH A MAGNET.

Evening Post, Volume CVIII, Issue 120, 16 November 1929, Page 22

OPERATION WITH A MAGNET.

[ For nearly ten years a Canadian war veteran carried a buliet in his lung. Although located by X-rays, it "was in such a position that it could, not-.be reached by forceps. It has been r€|r moved at last by. holding, a magnet over the patient's Qhfst-; and drawing the bullet ta a point where it could be seized ,-with for'eeps; thfough the windpipe/ Tlie nickef; coating of the bullet provi<Je.d the neEepary magnetisable element. - .•

When the world's wireless, stations tune up to send their ' wavW* rippling round the globe the earth does not pror vide all the listeners-in, . ■■ ' ■ . . When a wireless wave is sent put it rebounds (like a water:, \yaye from a river embankment) from the flayer of electrified gases on the borders of the earth's atruqsphere. It is"because of this continuous rebound that the wave goes circling round ttie'glpbe.i ' It echoes from this Heaviside layer. The echoes can be caught as repeats every seventh part-of a second. They have been round the world two or three times. But fligt in' Nor' way, then at Eindhoven, aid now in England, other echoes, tlesidea these regular ones which can be explained, and accounted for, have "been!' heard!' They come after far ■ longer interya.lß,, as if they haS been, echoed'from far' greater distances. ' They must come from millions of miles;: ■ : ' If the right explanation-of'them is that they are ecKged from" masses pf electrons far awayinv Space then two facts become clear. The .-first fact is that the layer of electrified gas does' not stop them all; - Th ? second fact is that a great many waves .must get through, because the chance' of ;.hitting any one train of' .waves: against'anything which can reflect them js a- small one. . . .'■■'. If a large proportion o£ all th^ mil r lions of waves sent out every Jiour of the day can get through ."into space then we may imagine that they go on travelling almost endlessly into space, like the rays of light from one ptar to another. They go on .till spijiß of tliem may find a star w}th planeta like our own sun. • •-,■-..- '■..-.■".;•' Therefore, though the ijea of pending wireless messages to Mars more distant planets and heavenly bodies may now seem a dream-it is' B pt impossible that the dream may come true, for even at this moment Mars and other planets "jay be receiving some fragments of our signals. <