On thermodynamics and constitutive relations.- Actions for general thermodynamical systems.- Thermodynamics and the constitutive relations for second sound in crystals.- Dissipation,stabiltzation and the second law of thermodynamics.- Rational thermodynamics of mixtures of fluids.- On nonstationary thermodynamics, relativistic acceleration waves in ideal fluids.- Some thermodynamical problems in magnetic theory.- Relaxation phenomena via hidden variable thermodynamics.- Conservation laws and symmetric hyperbolic system for a thermoviscous fluid.