The Primary Cosmic Radiation

That the true nature of the primary cosmic radiation so long escaped those working in the field now seems quite understandable in view of the many new and unexpected phenomena involved. The search, with the many false leads and interpretations, forms one of the most interesting stories in the annals of science. While we still do not know all the details of the primary radiation, we do know many of the major features; and the once baffling process of the diffusion of the primary radiation through our atmosphere has now largely yielded to the combined attack of many research centers around the world.