first mentioned this work in a paper he delivered before the Zoological Society of London in May 1896. The book Sciagraphs of British Batrachians and Reptiles (sciagraph is an obsolete name for an X-ray photograph), by Green and James H. Gardiner, with a foreword by Boulenger, was published in 1897.

The first medical X-ray made in the United States was obtained using a discharge tube of Ivan Puluj's design. In January 1896, on reading of Röntgen's