Image: Sylvanus Tyler ebony February 1949 p27

Description: Photograph of Sylvanus A. Tyler from "Atom Scientists: Ten Negro Scientists at Argonne Lab Help in Race to Harness Atomic Materials”, Ebony magazine, September 1949, pp. 26-28. Copyright not renewed. The caption reads: "Sylvanus A. Tyler, 34, assists biology division in planning experiments efficiently. Fisk graduate is crack mathematician who worked with famed Arthur Compton on cosmic ray analysis, once helped compile statistics for book, Black Metropolis.
Title: Sylvanus A. Tyler
Credit: Ebony magazine
Author: UnknownUnknown
Permission: This work is in the public domain because it was published in the United States between 1927 and 1963, and although there may or may not have been a copyright notice, the copyright was not renewed. For further explanation, see Commons:Hirtle chart and the copyright renewal logs. Note that it may still be copyrighted in jurisdictions that do not apply the rule of the shorter term for US works (depending on the date of the author's death), such as Canada (50 years p.m.a.), Mainland China (50 years p.m.a., not Hong Kong or Macao), Germany (70 years p.m.a.), Mexico (100 years p.m.a.), Switzerland (70 years p.m.a.), and other countries with individual treaties.
Usage Terms: Public domain
License: Public domain
Attribution Required?: No