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- Essay by John Dixon, "Observations on Locomotive Engines and Their Performances on the Liverpool and Manchester Railway," 1833 - The Liverpool and Manchester Railway, connecting its namesake cities in the United Kingdom, opened in 1830. It was the first railroad operated exclusively with steam locomotives. In this essay, civil engineer John Dixon reported on the speed and fuel consumption of those locomotives. Dixon concluded that larger engines, though slower and heavier, were most profitable for hauling freight.

- September 01, 1833
- Collections - Artifact
Essay by John Dixon, "Observations on Locomotive Engines and Their Performances on the Liverpool and Manchester Railway," 1833
The Liverpool and Manchester Railway, connecting its namesake cities in the United Kingdom, opened in 1830. It was the first railroad operated exclusively with steam locomotives. In this essay, civil engineer John Dixon reported on the speed and fuel consumption of those locomotives. Dixon concluded that larger engines, though slower and heavier, were most profitable for hauling freight.
- Firing Module, circa 1990 - By 1990, computer engine controls were nearly universal on American automobiles. This computer module controlled a gasoline engine's ignition firing sequence. It was part of a larger system designed to help internal combustion engines meet federal air quality and fuel efficiency standards.

- circa 1990
- Collections - Artifact
Firing Module, circa 1990
By 1990, computer engine controls were nearly universal on American automobiles. This computer module controlled a gasoline engine's ignition firing sequence. It was part of a larger system designed to help internal combustion engines meet federal air quality and fuel efficiency standards.