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Show "Electric Eye" Is a Perfect Watchman 'plllu famous Westinghouse "electric eye," or photo-electric cell watch- man, has been perfected to such a degree that Westinghouse has placed a $20 bill In an exhibit at the World's fair in Chicago, free to anyone any-one who can get it. The catch In the proposition Is that as the hand is pushed through a miniature paying teller's cage it interrupts a beam of kisrht which In turn causes the photo-electric cell to raise a barrier Instantly to protect the treasure it is guarding. |