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Show Rctlvrlng Elasticity of Rubber. Rubber iirtlclfs tluit ha e become hard reenter their ulurilrliy In a short lline If ilacti lu .'1 M' will carbolic wnter or It per cent nnll'itu fiiliitlou In ln eni of the ciirbollc sulniliin It niiisi not he furipiiHii (lull liliick tood expeil id 11 lo-imuv gray. If 1t Is iloilrcil in i-i-sei've Hie lilnck or red color of lliu ifiiniN, Hint, too. Villi lx ilnne. A I per ceiiWlJiil'Hi ' nintusu!ili:ilu of poliisli J eiiiplo.W'il It Ik line lltilt thin viin-l, iiii!eaS' nut, Inn Hie nwi'mntlon Jif" elamtlclij I iiilh! eoiislilemlile. V |