Show Freaks and Oddities In Science N News a 71 J A new instrument u used d by chemists chemis interested U in III problems of high temperature is a n tube lined with a thin film of metal which is sensitive to light and anti changes its resistance to electricity In proportion to the intensity of a beam falling on it Light from material in a furnace undergoing the ordeal of analysis is focused on this tube The minute changes In electric current are magnified mag mag- by passing them through a series of vacuum tubes so that they will register themselves big enough to read y TI 1 A remarkable natural mirror on the face of d ra a boulder stands on the I Kickapoo Indian reservation res res- in Kansas One of its us sides is so highly polished that one can see sec ones one's image In it as in a glass Where it got this polish is more or less of a riddle Alternative theories of wind blown sand and the rubbing of animals either buffalo or cattle have been offered |