Lester F. Larsen Tractor Museum
The Lester F. Larsen Tractor Test and Power Museum is a museum dedicated to preserving and documenting the history of Nebraska's tractor test law, operated by the University of Nebraska–Lincoln in Lincoln, Nebraska. The Nebraska Tractor Test Law, passed in 1919 and administered by the university, requires performance testing on every tractor with forty horsepower or more sold in the state.
Source: Wikipedia — Lester F. Larsen Tractor Museum (CC BY-SA 4.0)