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.
Disclaimer: A work of the Library of Congress is "a work prepared by an officer or employee" of the federal government "as part of that person's official duties." In general, under section 105 of the Copyright Act, such works are not entitled to domestic copyright protection under U.S. law and are therefore in the public domain. This website is developed as a part of the world's largest public domain archive, PICRYL.com, and not developed or endorsed by the Library of Congress, https://www.picryl.com
![[Eight-foot mercury barometer and water pumping demonstration from four-story house proving law that height of fluids raised by suction or pressure varies inversely to its specific gravity]](https://cache.getarchive.net/Prod/thumb/cdn4/L3Bob3RvLzE2NjkvMDEvMDEvZWlnaHQtZm9vdC1tZXJjdXJ5LWJhcm9tZXRlci1hbmQtd2F0ZXItcHVtcGluZy1kZW1vbnN0cmF0aW9uLWZyb20tZm91ci1zdG9yeS02NDAuanBn/320/470/jpg "[Eight-foot mercury barometer and water pumping demonstration from four-story house proving law that height of fluids raised by suction or pressure varies inversely to its specific gravity]")
![[Springs and devices for measuring their tension and strength]](https://cache.getarchive.net/Prod/thumb/cdn4/L3Bob3RvLzE2NzQvMDEvMDEvc3ByaW5ncy1hbmQtZGV2aWNlcy1mb3ItbWVhc3VyaW5nLXRoZWlyLXRlbnNpb24tYW5kLXN0cmVuZ3RoLTY0MC5qcGc%3D/40/50/webp "[Springs and devices for measuring their tension and strength]")
![[Technical illustration shows four stages of André Garnerin's parachute: apparatus for inflating a balloon with hydrogen, a balloon in flight, parachute attached to ascending balloon, and parachute deployed in descent] / Fauchery, del. et sc.](https://cache.getarchive.net/Prod/thumb/cdn4/L3Bob3RvLzIwMTkvMDkvMTQvdGVjaG5pY2FsLWlsbHVzdHJhdGlvbi1zaG93cy1mb3VyLXN0YWdlcy1vZi1hbmRyZS1nYXJuZXJpbnMtcGFyYWNodXRlLWFwcGFyYXR1cy02NTYxYWUtNjQwLmpwZw%3D%3D/40/58/webp "[Technical illustration shows four stages of André Garnerin's parachute: apparatus for inflating a balloon with hydrogen, a balloon in flight, parachute attached to ascending balloon, and parachute deployed in descent] / Fauchery, del. et sc.")
![[Men carrying large barometer prove existence of barometric pressure by climbing the Puy de Dôme] / Yan Dargent.](https://cache.getarchive.net/Prod/thumb/cdn4/L3Bob3RvLzIwMTkvMDkvMTcvbWVuLWNhcnJ5aW5nLWxhcmdlLWJhcm9tZXRlci1wcm92ZS1leGlzdGVuY2Utb2YtYmFyb21ldHJpYy1wcmVzc3VyZS1ieS1jbGltYmluZy0wNDUzYzctNjQwLmpwZw%3D%3D/40/32/webp "[Men carrying large barometer prove existence of barometric pressure by climbing the Puy de Dôme] / Yan Dargent.")
