Biographical Memoir of Zay Jeffries by W.D. Nix

I have written a National Academy of Sciences biographical memoir of Zay Jeffries, one of the great American metallurgists of the 20th century.  I am posting the link to the NAS website here with the thought that some readers of iMechanica might be interested in the piece.  Some will be interested to learn that Jeffries came very close to discovering dislocations some 18 years before the great papers of Taylor, Orowan and Polyanyi in 1934.

http://www.nasonline.org/publications/biographical-memoirs/memoir-pdfs/j...

W.D. Nix