ROBERT LEMLICH University of Cincinnati, Cincinnati, Ohio
INTEACHWG unit operations, actual demonstration of the principles involved is often difficult to accomplish. To be sure, most schools have a unit operations laboratory, hut its pilot plant size equipment is not well adapted for operation in immediate conjunction with the regular lecture course. As a result, the undergraduate unit operations lecture course is frequently devoid of all demonstration-a situation which our colleagues in the physics or chemistry departments would never countenance in their basic lecture courses. Furthermore, in the laboratory itself the difficulties involved in mastering the technique of merely operating a relatively complex piece of equipment often detract from the students' appreciation of the basic principles involved. In addition, the data obtained in undergraduate experiments are sometimes so erroneous as t o render valid conclusions regarding the particular operation unobtainable. In an effort to meet these difficulties, a t least in part, the author has made use of some very simple yet quantitative experiments (not all of which are entirely new) designed to illustrate fundamental principles. These '
