Temperature and compositional dependences of electrical conductivity i
n lead-iron glasses are reported. The experimental results are analyse
d in the light of existing theories. It has been observed that the ele
ctrical conduction in these glass compositions at high temperatures is
best described by Mott's phonon-assisted hopping model, while the low
-temperature data are consistent with the variable-range hopping model
. Hopping at high temperatures occurs in the non-adiabatic regime. The
generalized hopping model of Schnakenberg is the best to interpret th
e temperature dependences of the conductivity and activation energy ov
er the glass compositions studied. Values of the physical parameters o
btained by the best fits of the experimental data are consistent with
the glass compositions.