Cahan

David Cahan is the Charles Bessey Professor of History at the University of Nebraska. He is the author of "An Institute for an Empire: The Physikalisch-Technische Reichsanstalt 1871-1918 and coauthor of "Science at the American Frontier: A Biography of DeWitt Bristol Brace. He is the editor of "Hermann von Helmholtz and the Foundations of Nineteenth-Century Science and Helmholtz's" Science and Culture: Popular and Philosophical Essays.