Photo of experimenters taking an <a href="https://en.wikipedia.org/wiki/X-ray" class="extiw" title="en:X-ray">X-ray</a> with an early <a href="https://en.wikipedia.org/wiki/Crookes_tube" class="extiw" title="en:Crookes tube">Crookes tube</a> apparatus, from the late 1800s.  The Crookes <a href="https://en.wikipedia.org/wiki/x-ray_tube" class="extiw" title="en:x-ray tube">x-ray tube</a> is visible suspended at center.  The upper man is examining the bones of his hand with a <a href="https://en.wikipedia.org/wiki/fluoroscope" class="extiw" title="en:fluoroscope">fluoroscope</a> screen. The lower man is taking a <a href="https://en.wikipedia.org/wiki/radiograph" class="extiw" title="en:radiograph">radiograph</a> of his hand with a <a href="https://en.wikipedia.org/wiki/photographic_plate" class="extiw" title="en:photographic plate">photographic plate</a>.  The power source is an <a href="https://en.wikipedia.org/wiki/induction_coil" class="extiw" title="en:induction coil">induction coil</a>, seen at left, and the mechanism immediately to its right against the wall is a motor-operated 'break wheel' interrupter in the coil's primary circuit.  The large flat disk on the table is a rheostat (adjustable resistor) power control to adjust the primary current to the coil.  Several spare Crookes X-ray tubes are seen in a rack on the wall.   The apparatus is described and diagrammed on p.88 of the source.  No precautions against radiation exposure are taken; its hazards were not known at the time.  The original image was half-tone.  Alterations: removed frame.
William J. Morton
Downloaded 2007-12-23 from <a rel="nofollow" class="external text" href="https://books.google.com/books?id=whc4AAAAMAAJ&amp;pg=PT5">William J. Morton and Edwin W. Hammer (1896) <i>The X-ray, or Photography of the Invisible and its value in Surgery</i>, American Technical Book Co., New York, fig. 54</a> on Google Books