MUFON-UFO-Journal-1976-5-May-Skylook_page_13

MUFON-UFO-Journal-1976-5-May-Skylook | page 13 | https://thedailydialectics.com/pdfs/space/ufos/mufon/MUFON-UFO-Journal-1976-5-May-Skylook/MUFON-UFO-Journal-1976-5-May-Skylook.pdf

outside-the suspected area, ob- taining’ the ‘background. count’. ”: for. that particular area. Or- ganic-quenched end-window tubes: show a normal background . of -50- to 70 cpm (counts per minute). Halogen-quenched tubes show a background of 30 to 40 counts per minute. Background radia- tion will…