Abstract
If Permalloy (76 percent Ni-24 percent Fe) which has been previously quenched from 600°C is annealed at 490°C, its energy content decreases with time of annealing, not monotonically but in two steps. By direct measurement of the time-rate of energy decrease, it was concluded that the first step is connected with formation of short-range order and the second with that of longrange order.