. Radio, miracle of the 20th century ... a story of human achievement that stands unrivalled in the history of humanity, together with a colorful portrayal, giving a broad, general view of the whole subject of wireless telegraph and telephone and its marvelous development . 3^ ) o 31 5 s Pi o £ o r £§ O o£ N 0) O c£ v ■ si d t_ S m rt N O. MIRACLE OF THE AGE 113 north and south poles alternately. The half needles maybe broken again into equal or unequal portions and thisprocess continued, the result being the same each poles of every short piece of the needle appearweaker than the
. Radio, miracle of the 20th century ... a story of human achievement that stands unrivalled in the history of humanity, together with a colorful portrayal, giving a broad, general view of the whole subject of wireless telegraph and telephone and its marvelous development . 3^ ) o 31 5 s Pi o £ o r £§ O o£ N 0) O c£ v ■ si d t_ S m rt N O. MIRACLE OF THE AGE 113 north and south poles alternately. The half needles maybe broken again into equal or unequal portions and thisprocess continued, the result being the same each poles of every short piece of the needle appearweaker than the original poles. This is due chiefly be-cause the poles are so much nearer together and the re-pulsion of one pole nearly equals the attraction of theother pole and therefore it nearly counteracts. Hence,you may think of a magnet as being built up of an im-mense number of particles, each having a north and asouth pole. In the body of the magnet the north pole ofone particle being so closely in juxtaposition with thesouth pole of the next particle the effect is the unneutralized poles at the ends of the magnetform the true poles. There is such a thing as reaching the saturationpoint of magnetism. This is nothing more nor less thanthe point beyond which it is impossible to produce furthermagnetization in a given body. It
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Keywords: ., bookcentury1900, bookdecade1920, bookidradiomiracle, bookyear1922
