Abstract
A. Sanfeld Sussex: John Wiley. 1968 Pp. xxiv + 258. Price £4 10s.
In irreversible thermodynamics the entropy change in an incremental process which takes place in a macroscopic volume element of a system is written as dcS + d1S. The first term is the entropy flow from the outside due to interactions with the surroundings, the second term arises from internal changes and the second law is introduced in the form d1S≥0.