Samples of Fe, Co, Ni, and PY 50 were investigated at 77-300°K.Apparent changes in the relative participation of neg. Barkhausen jumps (B.j.) in the magnetization were observedFor increasing coercive force, the relative number of neg. B.j. (n) decreased exponentially.With decreasing temperature a larger n was recorded.Increased coercive force with decreasing temperature led to decreasing n.In Fe and Ni n increased at 77-300°K.In Co at 300-100°K, n increased.The measured n for Co at 77.4°K was much less than that at 100°K.Below 100°K, n decreased.