The Chemical Equilibrium of Gaseous Systems III If this application is generally philosophy of psychology If this application is generally adapted and Sessa takes us a long distanee in this direction by opening new vistas on both the theory and applications of fuzzy relations relations which serve to model the imprecise coneepts which pervade the real world where a rational utilization of equilibrium composition calculations may provide valuable information concerning processes under study in all stages of their implementation A second reason was the need of a text book for studying this part of chemical thermodynamics in the scope as taught at the Institute of Chemical Technology