RT Journal Article SR Electronic T1 SIGMA XI AND THE CALIFORNIA INSTITUTE OF TECHNOLOGY JF Science JO Science FD American Association for the Advancement of Science SP 463 OP 463 DO 10.1126/science.61.1583.463 VO 61 IS 1583 A1 Shedd, John C. YR 1925 UL http://science.sciencemag.org/content/61/1583/463.1.abstract AB