  The non-Fermi-liquid (NFL) behavior observed in the low temperature specific
heat $C(T)$ and magnetic susceptibility $\chi(T)$ of f-electron systems is
analyzed within the context of a recently developed theory based on Griffiths
singularities. Measurements of $C(T)$ and $\chi(T)$ in the systems
$Th_{1-x}U_{x}Pd_{2}Al_{3}$, $Y_{1-x}U_{x}Pd_3$, and $UCu_{5-x}M_{x}$ (M = Pd,
Pt) are found to be consistent with $C(T)/T \propto \chi(T) \propto
T^{-1+\lambda}$ predicted by this model with $\lambda <1$ in the NFL regime.
These results suggest that the NFL properties observed in a wide variety of
f-electron systems can be described within the context of a common physical
picture.
