Our Collection

At the Institute’s core is the Gilder Lehrman Collection, one of the great archives in American history. More than 70,000 items cover five hundred years of American history, from Columbus’s 1493 letter describing the New World to soldiers’ letters from World War II and Vietnam. Explore primary sources, visit exhibitions in person or online, or bring your class on a field trip.

Evans, Oliver (1755-1819) to Samuel Pitkin

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Gilder Lehrman Collection #: GLC04265 Author/Creator: Evans, Oliver (1755-1819) Place Written: Philadelphia, Pennsylvania Type: Autograph letter signed Date: 23 November 1811 Pagination: 2 p. ; 20.3 x 25.1 cm.

Hopes Congress will pass new laws that will help him to extend his steam engine patent. Argues that by protecting patents the government will be aiding the public good, and encouraging innovation.

Oliver Evans invented the high pressure steam engine, which weighed far less than earlier steam engines.

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