-4 sition. At the temperatures below 1.6 K the sample resistance was less than 10 of the normal residual resistance value. The detectable temperature dependence of the resistance was observed up to 4.6 K. When the sample with lower atomic ratio H/Pd= 0.81 was measured, the transition started at about 2.5 K and at 1.25 K, the lowest temperature obtainable with the arrangement applied, tb. e sample still exhibited a finite value of the resistance. But the transition region seems to be narrower. When the hydrogen concentration was lowered down to the atomic ratio value H/Pd= 0.73 no trace of the decrease of the electrical resistance was found down to the temperature 1.25 K. The sensitivity of the electrical resistance measurements was better than