Traditionally, research in chemistry has been divided into four areas of specialization. Inorganic chemistry deals with all the chemical elements except carbon, and the compounds which these elements form. Organic chemistry is devoted to the study of the almost limitless number of compounds containing carbon. Analytical chemistry is concerned with the determination of the composition of substances, and with the detection of elements in quantities however minute. Physical chemistry provides a means of understanding the physical properties of matter and the processes of its transformations, both at the macroscopic and molecular levels. These barriers have begun to disappear as much of the current research in the Department now crosses these divisions.