CATALOG 1952-1953 The Highway Materials Laboratory provides for routine testing and identification of bituminous materials used in highway construction. Viscosimeters, penetrometers, flash point testers, a ductilometer and other equipment needed for this type of testing are available. Bituminous paving mixes may be studied by use of a Hubbard-Field, Marshall and Hveem Stability apparatus and centrifuge extraction device. One of the features of the University campus is a modern up-to-date pilot plant for the study of sewage treatment methods. The pilot plant extends over an acre in area and contains 31 scale-model units actually in the process of sewage treatment. The various model units are designed to provide the greatest flexibility in sewage treatment. Three or more conventional treatment processes are in operation simultaneously on pilot plant scale treating approximately 90,000 gallons of sewage or trade waste each day. The pilot plant, together with the main campus sewage disposal plant, comprise the field laboratory for sanitary engineering studies and research. There are also two modern instruction and research laboratories fully equipped for the biological, biochemi- cal and bacteriological studies necessary for water and sewage treatment. Public Health Engineering has become a separately accredited option in Civil Engineering. ELECTRICAL ENGINEERING LABORATORIES The Electrical Engineering Laboratories are located for the most part in the Engineering and Industries building. The equipment ranges from that suitable for instruction in electrical fundamentals to that available for the most advanced types of electrical research. The Dynamo Laboratory provides facilities for instruction in direct and alternating current rotating machinery and transformers for students of all branches of engineer- ing, as well as for more advanced study by electrical students of the power major. Transformer banks are available for both single phase and poly phase transformation. Recent acquisitions include fractional horsepower motors and constant current trans- formers. For advanced instruction, such units as the exploring coil generator, ampli- dyne, mototrol, synchronous converter, sine-wave generator, synchronous dynamometer set, rectifier-inverter units and several matched sets of selsyn units provide a wide se- lection for specialized study. In addition to standard instrumentation, there are avail- able in the laboratory recording ammeters and voltmeters, and a late model 6-element magnetic oscillograph. The Circuits Laboratory is provided for the thorough study of electrical measure- ments, both D.C. and A.C., and for the analysis of linear circuits. The Communications Laboratory provides instruction in the fundamentals of vacuum tube and gas filled tube characteristics. For students in the Communication option the Electronic Laboratories, which include radio, television, and microwave departments are available. Here the student will find many of the most modern devices in this field, together with the necessary equipment to analyze and test their per- formance. A partial list includes numerous types of transmitting and receiving de- vices, including short-wave and frequency modulation, television apparatus and wire- communication equipment. Special devices include signal generators, square wave generators, audio and radio frequency oscillators, radio frequency bridges, field strength measuring equipment, precision wave meters, cathode ray tubes, crystal control standards of frequency, and a large variety of all types of electron tubes. A recent addition is a shielded room where radio measurements may be made without interference from stray fields.