History of the hamburger hand at home using specialized chisels, intensive manual labor that severely limited the amount that could be produced. It is very likely that the invention of the meat grinder contributed directly to the popularization of Hamburg steak, while the steak gradually became distant from its German roots in the minds of many Americans. Minced meat also came to be used in other popular American foods, including hot dogs and meatloaf. Another development facilitating the invention and popularization of the proto-hamburger was the increased production of beef through livestock intensification. By the late 19th century, an increasing amount of land was
Viktor Hamburger patterns, a finding that contradicted contemporary assertions of behavioral psychologists. Hamburger later revisited nerve growth factor, demonstrating that it was required for the maintenance of neural cells. Viktor Hamburger Viktor Hamburger (July 9, 1900 – June 12, 2001) was a German professor and embryologist. In 1951 he co-authored the Hamburger-Hamilton stages. Hamburger lectured, among others, Nobel Prize-winning neurologist Rita Levi-Montalcini, who identified nerve growth factor along with Hamburger when they collaborated. Hamburger began to work at Washington University in St. Louis in 1935; he retired from his professor position in 1969 and continued researching until the 1980s. Hamburger was born