Susceptibility measurements on the Kondo alloy La:Ce show that X = cF(T,H) for 1.3 K ≤ T ≤ 300 K, c ≤ 15 at %, H ≤ 20 kG where F is independent of concentration c. At high temperatures (T > 30 K), F(T,O), like other Kondo systems, obeys a Curie‐Weiss law 1/(T + 27). At low temperatures (0.6 ≤ T ≤ 30 K), f (T,0) ∝ T−1/2. To test the sensitivity of this result to local environment and the effect of spin‐orbit scattering, measurements were made on Ce .01ThxLa.99−x (x ≤ 0.4) alloys. These measurements show that the Ce contribution to the susceptibility, cF(T,0), is unchanged by the addition of Th. The magnetic field dependence of X does not fit a Brillouin function. Generalizing Anderson's suggestion, a phenomenological model is developed which assumes that the density of states N(E) ∝ (e2 + Δ)−1/4 whwrw Δ−1 is a lifetime. The calculated numerical results from this model for F(T,H) are in good agreement with the experimental results. Qualitatively F ∝ (T2 + μ2H2 + Δ)−δ where δ = 1/4. The Hirschkoff et al. data on Cu:Fe also fits this form with δ = l/3 and Δ∝c2 . The value δ = 1/3 does not fit our data. The importance of crystalline fields and the value of TK will be discussed. Other work on this system is briefly reviewed.