CHEMICAL ENGINEERING, AS WE KNOW IT TODAY, DEVELOPED AS A MAJOR ENGINEERRING DISCIPLINE IN THE UNITED KINHDOM IN THE INTERWAR YEARS AND HAS GROWN RAPIDLY SINCE THAT TIME. THE UNIQUE CONTRIBUTION OF THE SUBJECT OF THE INDUSTRIAL SCALE DEVELOPMENT OF PROCESSES IN THE CHEMICAL AND ALLIED INDUSTRIES WAS INITIALLY ATTRIBUTABLE TO THE IMPROVED UNDERSTANDDING IT GAVE TO THE TRANSPORT PROCESSES-FLUID FLOW, HEAT TRANSFER AND MASS TRANSFER- AND TO THE DEVELOPMENT OF DESING PRINCIPLES FOR THE UNI