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The metallic state of a high-quality (TMTTF)2 Br sample was stabilized under a pressure of 26 kbars. The magnetoresistance of the system was then studied up to 20 teslas for a field rotating in the least-conducting plane. The anisotropy of the magnetoresistance was found to be different from what had been observed in the TMTSF family. For a field along the c-axis, a small kink in the magnetoresistance at H = 13 T is detected which may be the first signature of the appearance of the FISDW states.

Specific heat measurements on CeAl3 are described and compared to thermal‐expansion results. At very low temperatures, the Gruneisen parameter reaches giant negative values. Comparisons are made with the properties of 3He and the unstable‐valent 4f compounds (YbCuAl, CeBe13, CeSn3, and CePd3). It is suggested that the magnetic anisotropy may play a major role.

Electron tunnelling data in (TMTSF)2 X-GaSb Schottky barriers support the idea that strong superconducting fluctuations exist in quasi-one-dimensional (TMTSF)2X up to temperatures which are about one order or magnitude higher than the 3-D ordering critical temperature. Other tunnelling data tend to indicate that stabilization of superconductivity is possible at high temperature via chain cross-linking.

We discuss the transverse magnetoresistance of nickel at low temperature and its dependence on residual impurity. It appears from our results on some nickel dilute alloys that the difference between the relaxation times of spin ↑ and spin ↓ conduction electrons is a dominant mechanism for the magnetoresistance.