11. In 1877 R�ntgen published his first X-ray photograph , Pulyui published high-quality X-ray images in journals in Paris and London. 12. He made an X-ray photograph of his hunting rifle and found a flaw in the metal of the barrel. 13. But when Bull looked at an X-ray photograph of the painting, he saw two lines invisible to the eye. 14. X-ray photographs show that Picasso first executed a self-portrait that he later replaced by the portrait of his friend. 15. An accidental X-ray photograph had even been made at the University of Pennsylvania _ but recognized only in retrospect. 16. American paleontologist John Ostrom later identified the structure as part of the right coracoid based on X-ray photographs of this specimen. 17. In the middle is one of the more-than-life-size figures, based on X-ray photographs , that were made quite some time ago by Rauschenberg. 18. On half an hour Andre Ooijer was escorted off the pitch and straight to hospital for X-ray photographs with a forearm injury. 19. In 1969 Konrad Oberhuber of the National Gallery of Art in Washington asked the National Gallery to take x-ray photographs of their version. 20. Fermi decided that they should research X-ray crystallography, and the three worked to produce a Laue photograph an X-ray photograph of a crystal.
