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Abstract
Some of the important results emerging from our recent pressure studies of liquid crystalline transitions are presented. In particular, the following topics are discussed: (i) The relation between P m, the maximum pressure of smectic stability in reentrant mesogens, and the range of the nematic phase at atmospheric pressure vis-a-vis the molecular structure; (ii) Piezothermal studies in the vicinity of the A-N transition in 8 OCB; (iii) The influence of molecular ordering on the pressure behavior of the nematic-isotropic transition in reentrant nematic mixtures; and, (iv) The relation between the pressure behavior of the smectic A phase and the interdigitation of the molecules.