初识张先生是在重庆中央大学,他在化学系讲授物理化学,我则在化工系教化工热力学等课。根据国外公认的说法,化学工程是物理化学在化学工业中的应用,也就是说,没有物理化学的基础,就谈不上有化学工程,我感到极有必要与张先生沟通情况。有一段时间,我们两人都在沙坪坝附近的兵工大兼课,从那时起,一直到他调离南京工学院去上海工作,我经常向张先生讨教有关物理化学中的问题,从 Mr. Chang was at Chungking Central University where he taught physics and chemistry and I taught chemistry and thermodynamics at the Department of Chemical Engineering. According to the accepted foreign view, chemical engineering is the application of physical chemistry in the chemical industry. In other words, without chemical and physical chemistry, there is no chemical engineering. I feel that it is extremely necessary to communicate with Mr. Zhang. For a time, both of us had large classes in the armaments school near Shapingba, and from that time until he was transferred from Nanjing Institute of Technology to work in Shanghai, I often asked Zhang questions about physical chemistry from