2022-06-222022-06-22195213710841https://hdl.handle.net/10657/9876A review of the incedents which led to the discovery of cosmic rays is presented. The corpuscular nature of the readiation is discussed breifly, and the two major components are reviewed with special emphasis being placed upon the soft component. Secondary shower radiation and the frequency of those showers are reviewed. The biological action of cosmic radiation is summarized briefly, and some of the basic research with bacteria, plants and plant seeds, and animals is reported. A report of an investigation into the effects of secondary cosmic ray showers upon chick embryos is included.application/pdfenThis item is protected by copyright but is made available here under a claim of fair use (17 U.S.C. Section 107) for non-profit research and educational purposes. Users of this work assume the responsibility for determining copyright status prior to reusing, publishing, or reproducing this item for purposes other than what is allowed by fair use or other copyright exemptions. Any reuse of this item in excess of fair use or other copyright exemptions requires express permission of the copyright holder.Thesisreformatted digital