Room temperature measurements on very pure specimens verify the Tyndall law,s=atm, which was determined by tensile measurements. The value ofmis approximately 0.6. Discrepancies in tensile creep tests reported by other observers are shown experimentally to be caused most probably by bending of the specimen during the creep process. The Bauschinger effect has also been investigated and creep at the very small stresses needed appears to follow the same creep law.