International flight 1785, when Jean-Pierre Blanchard and John Jeffries crossed the English Channel in a hot air balloon. It took more than a century for the first heavier-than-air object to repeat this process: Louis Blériot crossed the English Channel on July 25, 1909, winning a "Daily Mail" prize of £1,000. Aviation technology developed during World War I, with aviation between the World Wars seeing the development of international commercial flights. There was a combination of aircraft types which included airships and airplanes. The first airline to operate international flights was Chalk's Ocean Airways, established 1917, which operated scheduled seaplane services from Florida
John Sheldon (anatomist) October. It carried scientific instruments, but failed to ascend: Blanchard threw instruments overboard. They landed at Sunbury-on-Thames, and quarrelled, with Blanchard carrying on the flight alone. With John Jeffries, Sheldon then tried to have the Royal Society support more balloon ascents, but without success. Sheldon spent time in studying the lymphatic system, an area on which William Cumberland Cruikshank also was working. He devoted attention to embalming, too. Both interests came from William Hunter's inspiration, and were lifelong. Sheldon had a celebrated body of a young woman embalmed: there are differing accounts. It was that of a patient who had