The elastic constantsC₁₁,C₁₂ andC₄₄ of sodium chlorate single crystal have been evaluated using 10 MHz ultrasonic pulse echo superposition technique. The values areC₁₁=4.90,C₁₂=1.39,C₄₄=1.17 (× 10¹⁰N/m²) at 298 K and 6.15, 2.16, 1.32 (×10¹⁰N/m²) at 77 K. The data agree well with the values measured earlier up to 223 K. Brief mention is also made of the low temperature bonding problems in these soft crystals.

Electrical resistance measurements are reported on the binary liquid mixtures CS₂ + CH₃CN and CS₂ + CH₃NO₂ with special reference to the critical region. Impurity conduction seems to be the dominant mechanism for charge transport. For the liquid mixture filled at the critical composition, the resistance of the system aboveT_c follows the relationR=R_c−A(T−T_c)^b withb=0·6±0·1. BelowT_c the conductivities of the two phases obey a relation σ₂−σ₁=B(T_c−T)^β with β=0·34±0·02, the exponent of the transport coefficient being the same as the exponent of the order parameter, an equilibrium property.