25 Recordings Image: LOC's Public Domain Archive Public Domain Search}

Flame propogation in gas engines photographed. Washington, D.C., Aug. 26. A study of the mechanism of the flame propogation in the cylinder of a internal combustion engine is being made at the U.S. Bureau of Standards for the National Advisory Committee for Aeronautics. A secial bomb made of steel, shown in the foreground, and designed to withstand pressures up to 500 lbs. to the square inch is used to show the progress of the flame and the rise in pressure which may be recorded photographically during the gas explosions under carefully controlled conditions. The camera, where the recordings are made, is in front of Dr. Ernest F. Flock of the Bureau of Standards, carries its film on a drum which may be revolved up to 4,000 revolutions per minute, this camera also records a neon light flashing at a thousandth of a second. The independent effects of pressure, temperature and charge composition upon flame speed and explosion ratio may be made with this equipment, 8/26/37

Public domain historical photo, free to use, no copyright restrictions image - Picryl description

Flame propogation in gas engines photographed. Washington, D.C., Aug. 26. A study of the mechanism of the flame propogation in the cylinder of a internal combustion engine is being made at the U.S. Bureau of Standards for the National Advisory Committee for Aeronautics. A secial bomb made of steel, shown in the foreground, and designed to withstand pressures up to 500 lbs. to the square inch is used to show the progress of the flame and the rise in pressure which may be recorded photographically during the gas explosions under carefully controlled conditions. The camera, where the recordings are made, is in front of Dr. Ernest F. Flock of the Bureau of Standards, carries its film on a drum which may be revolved up to 4,000 revolutions per minute, this camera also records a neon light flashing at a thousandth of a second. The independent effects of pressure, temperature and charge composition upon flame speed and explosion ratio may be made with this equipment, 82637

A man working on a machine in a factory, Library of Congress Harris and Ewing collection Title from unverified caption data received with the Harris & Ewing Collection. Gift; Harris & Ewing, Inc. 1955. General More

Receipt of recordings made by John Work

Public domain scan of American Folklife Center document, manuscript, free to use, no copyright restrictions image - Picryl description.

Index card tally of recordings made at 1943 Fort Valley Festival

Public domain scan of American Folklife Center document, manuscript correspondence, free to use, no copyright restrictions image - Picryl description.

The boatmen's dance - American song, public domain sheet music

From Favorites from the Song of America Tour with Thomas Hampson, baritone, and Wolfram Rieger, piano. Recorded in the Coolidge Auditorium, Washington, DC, October 28, 2010. (Source) Copyright 1950 by The Aaron More

Bernstein departing for Israel to assume duties as musical director of the Israel Philharmonic Orchestra (IPO). He is carrying recordings he made with American orchestras to present to the IPO Music Library. The recordings include Gershwin's An American in Paris. Marc Blitzstein's Airborne Symphony and Igor Stravinsky's L'histoire du Soldat. September 17, 1948. Photograph source: Enell, Inc. (Music Division)

From: Photographs Series Public domain photograph - historical image of Russian Empire, free to use, no copyright restrictions image - Picryl description

Dancing to Wax Cylinder Recordings, Omaha pow-wow. Macy, Nebraska, 1983

1983 Omaha pow-wow. Macy, Nebraska. Public domain photograph - historical image of Nebraska, United States, free to use, no copyright restrictions image - Picryl description

Dancing to Wax Cylinder Recordings, Omaha pow-wow. Macy, Nebraska, 1983

Included in the photograph is Morgan Lovejoy. 1983 Omaha pow-wow. Macy, Nebraska.

Maria La Vigna Speaks During Presentation of Wax Cylinder Recordings

Maria La Vigna was involved in the production of "Omaha Indian Music: Historical Recordings from the Fletcher/La Flesche Collection." 1983 Omaha pow-wow. Macy, Nebraska.

Dorothy Sara Lee Speaks During Presentation of Wax Cylinder Recordings

1983 Omaha pow-wow. Macy, Nebraska. Public domain photograph - historical image of Nebraska, United States, free to use, no copyright restrictions image - Picryl description

Dancing to Wax Cylinder Recordings, Omaha pow-wow. Macy, Nebraska, 1983

Included in the photograph are David Blackbird and Melanie Parker. 1983 Omaha pow-wow. Macy, Nebraska.

Group of slides: 1 Bill Kerrey Remarks; 2-4 San Juan Pueblo Eagle Dance; 5-6 Pow-Wow Princess Watches Eagle Dance in Front of Speaker Stand; 7-8 Crowd Watches Eagle Dance; 9-10 Maria La Vigna Speaks During Presentation of Wax Cylinder Recordings; 11-15 Dancing to Wax Cylinder Recordings

1983 Omaha pow-wow. Macy, Nebraska. Public domain photograph - historical image of Nebraska, United States, free to use, no copyright restrictions image - Picryl description

Contact Sheet: 1A-5A Bill Kerrey Remarks; 6A-8A San Juan Pueblo Eagle Dance; 9A-12A, 15A Pow-Wow Princess Watches Eagle Dance in Front of Speaker Stand; 13A-14A Crowd Watches Eagle Dance; 17A-21A Maria La Vigna Speaks During Presentation of Wax Cylinder Recordings; 22A-26A Dancing to Wax Cylinder Recordings; 34A-37A Dorothy Sara Lee Hands Over Tapes to Tribal Chairman Elmer Blackbird

1983 Omaha pow-wow. Macy, Nebraska. Public domain photograph - historical image of Nebraska, United States, free to use, no copyright restrictions image - Picryl description