Show Spectroscopes Spectroscope's Eye Lye Useful in Finding Impurities in Iron Cambridge How the powerful eye of or the spectroscope scope is used in industry to analyze metals particularly in testing steels and alloys for impurities was explained to the symposium on metals p. p f t the Massachusetts x Le e e of Technology here by Prof George R. R Harrison director of the institutes institute's spectroscopy laboratory Even such luch small mall amounts amount as one part In ten thousand of some metals I such uch as al aluminum or magnesium will greatly neatly alter the properties of ot steel it has haa been found Thus the inclusion of ot one old automobile crank case of the wrong typo type may spoil tons tona of ot steel The spectrograph he explained constitutes a quick and accurate method of ot checking steel teel for tor such uch impurities |