Cosmic Ray Showers

A survey is given of literature pertaining to investigations of cosmic showers. The discussions are related to the significance of extensive air showers; methods for the observatioh, identification, and energy measurement of particle components in showers; and problems confronting research on extensive air showers and areas in which progress is forthcoming. The survey concerns the analysis of cosmic showers, which is carried on, not only to reveal the behavior of high-energy panticles, but also in the reasonable expectation that the radiation contains extractable information about its source and about the space through which it has propagated. (B.O.G.)