LOC's Public Domain Archive
The objects in this archive are from Library of Congress - the nation’s first established cultural institution and the largest library in the world, with millions of items including books, recordings, photographs, maps and manuscripts in its collections. The Library provides Congress, the federal government and the American people with a rich, diverse and enduring source of knowledge to inform, inspire and engage them and support their intellectual and creative endeavors.
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![Espy's patent conical ventilator. [Description of] James P. Espy. Washington 1842.](https://cache.getarchive.net/Prod/thumb/cdn18/L3Bob3RvLzIwMTkvMTAvMDcvZXNweXMtcGF0ZW50LWNvbmljYWwtdmVudGlsYXRvci1kZXNjcmlwdGlvbi1vZi1qYW1lcy1wLWVzcHktd2FzaGluZ3Rvbi0xODQyLWE2ODU5MC0xMDI0LmpwZw%3D%3D/320/375/jpg "Espy's patent conical ventilator. [Description of] James P. Espy. Washington 1842.")
![H. R. 234. January 27, 1836 ... A bill to provide compensation to James Barron for the use of his invention, called "A ventilator of ships." [Washington, 1836].](https://cache.getarchive.net/Prod/thumb/cdn4/L3Bob3RvLzE4MzYvMDEvMDEvaC1yLTIzNC1qYW51YXJ5LTI3LTE4MzYtYS1iaWxsLXRvLXByb3ZpZGUtY29tcGVuc2F0aW9uLXRvLWphbWVzLWJhcnJvbi1mb3ItNjQwLmpwZw%3D%3D/40/64/webp "H. R. 234. January 27, 1836 ... A bill to provide compensation to James Barron for the use of his invention, called \"A ventilator of ships.\" [Washington, 1836].")
![In memoriam James Clark Welling. [Washington, 1894].](https://cache.getarchive.net/Prod/thumb/cdn4/L3Bob3RvLzIwMTkvMDkvMTMvaW4tbWVtb3JpYW0tamFtZXMtY2xhcmstd2VsbGluZy13YXNoaW5ndG9uLTE4OTQtNzdlNTczLTY0MC5qcGc%3D/40/51/webp "In memoriam James Clark Welling. [Washington, 1894].")
![In memoriam James Clark Welling. [Washington, 1894].](https://cache.getarchive.net/Prod/thumb/cdn4/L3Bob3RvLzIwMTkvMDkvMTMvaW4tbWVtb3JpYW0tamFtZXMtY2xhcmstd2VsbGluZy13YXNoaW5ndG9uLTE4OTQtMWViNmMwLTY0MC5qcGc%3D/40/51/webp "In memoriam James Clark Welling. [Washington, 1894].")
