X-rays, ‘fax machines’ and ice cream cones debut at 1904 World’s Fair

Courtesy Missouri Historical Society Photographs and Prints Collections.Lee DeForest (seated) sending wireless telegraph message from the Louisiana Purchase Exposition. Photograph, 1904.April 30, 2004, marks the 100th anniversary of the 1904 World’s Fair, an event that showcased science advancements that startled the imagination a century ago and foretold technology still in place today. The fair was headquartered on the campus of Washington University in St. Louis, where significant scientific developments continue today, most notably at the nation’s second-ranked medical school but also across many science and engineering disciplines.