The authors explore the function of closed-circuit or industrial television and describe the tools which have been developed to realize it. A brief historical introduction in the first chapter covers the various attempts to televise in the prescientific era, developments during the era of speculation, and final emergence into the mechanical and electronic era. In chapter 2 the principal applications of television in industry, research, medicine, education, commerce, military affairs, and home and farm work are outlined. In chapter 3 the equipment which has been developed for closed-circuit television is described in detail, including the design and circuitry of the more conventional camera equipment, the miniaturization made possible by the transistors and 0.5-in. vidicons, the operation of color and stereo-television apparatus, and the television microscope.
In chapter 4 the status of closed-circuit television in 1957 is reviewed and examples are cited from actual practice in sufficient detail to enable the