Photograph shows fire fighters and steam fire engines in front of the Alexandria, Virginia fire department which was taken over by Union forces in early 1863.
Design drawings for a hydrostatic motor capable of up to 100,000 horse power, for use in air, sea and land transportation, invented by J.B. Metivier in 1867. (Source: A.G. Renstrom, LC staff, 1981-82).
Print show large crowd around Ulysses Grant, Pedro II (Emperor of Brazil), and large Corliss engine at Centennial Exposition in Philadelphia, Pa.
Photo shows men at the foundry and machine shop that produced automobile engines in 1903 and merged with Cadillac Motor Co. in 1905.
Photo shows the Willow Run manufacturing plant, run by the Ford Motor Company near Ypsilanti, Michigan, which made the B-24 Liberator bombers during World War II. (Source: Flickr Commons project, 2009)