Hannes, I suggest that you find copies of: Hermann, Armin (1979) The New Physics: the Route into the Atomic Age. In Memory of Albert Einstein, Max von Laue, Otto Hahn, and Lise Meitner: Inter Nationes Bonn-Bad Godesberg, Munich. There are photos of the apparatus that Friedrich and Knipping used for the first X-ray diffraction photos, the first Laue diagram, Einstein's postcard to Laue, Max von Laue, Peter Paul Ewald, etc. For pictures relating to Rontgen, see: Catalog of the Rontgen Rays Centennial: Exhibition on the Occasion of the Discovery of X-Rays in Wurzburg, on November 8, 1895: Martin von Wagner Museum, University of Wurzburg. This has a colored picture of Friedrich and Knippings's apparatus as well as pictures of almost everyone associated with the beginnings of X-ray diffraction. I have photos of Ralph Grim and William Bradley if you're interested in early clay mineralogists, but they're rather removed from Rietveld analysis. Dewey ______________________________________________________________ D.M.Moore, Senior Clay Mineralogist Ph (217)244-2529 Illinois State Geological Survey Home Ph 328-7507 615 E. Peabody Dr FAX (217) 244-2785 Champaign, IL 61820 e-mail [EMAIL PROTECTED]
