Hilt, Wilma Marguerite2014-11-032014-11-031937http://hdl.handle.net/2097/18566Cosmic rays--ObservationsCathode raysTextThis volume was digitized by the Kansas State University Libraries, and made accessible online due to deterioration of the original print copy. If you are the author of this work and would like to have online access removed, please contact the Library Administration Office, 785-532-7400, library@k-state.edu.