Volume IV/7 Liquid Crystals is devoted to critically selected and assessed fundamental data, mainly transition temperatures, which characterize the existing liquid crystalline phases and states of a large number of compounds. All relevant references including the very important patent literature and data (1850-1994) were collected in the data base LIQCRYST, from which the present Volume IV/7 has been derived by an individual critical choice of compounds, references and data. The printed tables offer an overall picture of the liquid crystalline field. Furthermore the comparison of corresponding data and perhaps the elucidation of structure-function relationships is facilitated, whereas the data base allows a facile access to any substructure and property search.