Experiments

Alexander Graham Bell Papers. Public domain scan of newspaper clippings. Free to use, no copyright restrictions image - Picryl description.

The Wilbur and Orville Wright Papers is a collection of documents related to the Wright brothers, two American inventors who are credited with building and flying the first successful powered airplane. The coll More

Alexander Graham Bell Papers. Public domain scan of newspaper clippings. Free to use, no copyright restrictions image - Picryl description.

Alexander Graham Bell Papers. Public domain scan of newspaper clippings. Free to use, no copyright restrictions image - Picryl description.

Alexander Graham Bell Papers. Public domain scan of newspaper clippings. Free to use, no copyright restrictions image - Picryl description.

Harvey W. Wiley Collection. Public domain photograph - Portrait, United States, free to use, no copyright restrictions image - Picryl description

A black and white photo of a group of people. Public domain portrait photograph, free to use, no copyright restrictions image - Picryl description

Benjamin Franklin and another man flying kite from doorway. Public domain photograph of a ship, free to use, no copyright restrictions image - Picryl description

Title based on: Wilbur & Orville Wright, pictorial materials: a documentary guide / Arthur G. Renstrom. Washington: Library of Congress, 1982, p. 113. Attributed to Wilbur and/or Orville Wright. Reference copy More

Photographs of the Construction and Repair of Buildings, Facilities, and Vessels at the New York Navy Yard

Photographs of the Construction and Repair of Buildings, Facilities, and Vessels at the New York Navy Yard

Photographs of the Construction and Repair of Buildings, Facilities, and Vessels at the New York Navy Yard

Photographs of the Construction and Repair of Buildings, Facilities, and Vessels at the New York Navy Yard

Photographs of the Construction and Repair of Buildings, Facilities, and Vessels at the New York Navy Yard

Photographs of the Construction and Repair of Buildings, Facilities, and Vessels at the New York Navy Yard

Photographer: Publishers Photo Ser. Armor - Armor Public domain photograph related to the United States in World War One, free to use, no copyright restrictions image - Picryl description

Photographer: Publishers Photo Ser. Armor - Armor Public domain photograph related to the United States in World War One, free to use, no copyright restrictions image - Picryl description

A group of men standing on the steps of a building. Public domain portrait photograph, free to use, no copyright restrictions image - Picryl description

The B-29 that sank into Lake Mead in 1948 was involved in scientific experiments meant to investigate the physical properties of the upper atmosphere in an effort to develop guidance systems to insure missile a More

Photographer: Navy Dept., Bureau of Construction & Repair Camouflage - Experiments Public domain photograph related to the United States in World War One, free to use, no copyright restrictions image - Picryl More

Photographer: Navy Dept., Bureau of Construction & Repair Camouflage - Experiments Public domain photograph related to the United States in World War One, free to use, no copyright restrictions image - Picryl More

Photographer: Navy Dept., Bureau of Construction & Repair Camouflage - Experiments Public domain photograph related to the United States in World War One, free to use, no copyright restrictions image - Picryl More

Photographer: Navy Dept., Bureau of Construction & Repair Camouflage - Experiments Public domain photograph of manufacturing workers, factory building, assembly line, free to use, no copyright restrictions ima More

Date Taken: 2/10/1919 Photographer: Western Newspaper Union Camouflage - Experiments

Photographer: Navy Dept., Bureau of Construction & Repair Camouflage - Experiments Public domain photograph of the board of directors, managers, group of men, portrait, office, committee, free to use, no copyr More

Photographer: Publishers Photo Ser. Armor - Armor Public domain photograph related to the United States in World War One, free to use, no copyright restrictions image - Picryl description

Date Taken: 2/10/1919 Photographer: Western Newspaper Union Camouflage - Experiments

Photographer: Navy Dept., Bureau of Construction & Repair Camouflage - Experiments Public domain photograph of cabinet furniture, free to use, no copyright restrictions image - Picryl description

Date Taken: 2/10/1919 Photographer: Western Newspaper Union Camouflage - Experiments

Photographer: Navy Dept., Bureau of Construction & Repair Camouflage - Experiments Public domain photograph related to the United States in World War One, free to use, no copyright restrictions image - Picryl More

Photographer: Navy Dept., Bureau of Construction & Repair Camouflage - Experiments Public domain photograph related to the United States in World War One, free to use, no copyright restrictions image - Picryl More

Photographer: Orren Jack Turner Colleges and Universities - Princeton Public domain photograph related to the United States in World War One, free to use, no copyright restrictions image - Picryl description

Photographer: Publishers Photo Ser. Armor - Armor Public domain photograph related to the United States in World War One, free to use, no copyright restrictions image - Picryl description

Picryl description: Public domain image of an aircraft, aviator, 1910s-1920s, early 20th-century aviation, free to use, no copyright restrictions.

Picryl description: Public domain image of a pilot, aviator, aircraft, free to use, no copyright restrictions.

Picryl description: Public domain image of an aircraft, aviator, 1910s-1920s, early 20th-century aviation, free to use, no copyright restrictions.

Picryl description: Public domain image of an aircraft, aviator, 20th-century aviation, free to use, no copyright restrictions.

Public domain photograph of pharmacy, convenience store, free to use, no copyright restrictions image - Picryl description

Picryl description: Public domain photograph of costume accessory, free to use, no copyright restrictions image.

Public domain photograph of an automobile, 1920s car, free to use, no copyright restrictions image - Picryl description

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

Emile Berliner 1851 – 1929 was a German-born American inventor and businessman. He is best known for his development of the flat disc record and the Gramophone. Berliner worked in the telegraph industry experim More

Originally housed in envelop labeled: "Roy M. Allen 1926." Verso: "represents about 1/200" length of contact, Roy M. Allen, Bloomfield, N.J., Photomicrograph, subject: Microphonic Contacts by transmitted light. More

Verso: "Roy M. Allen, Bloomfield, N.J., Photomicrograph, subject: Microphonic Contacts by opaque illumination. No. 1066, magnification 300x." Originally housed in envelop labeled: "Roy M. Allen 1926." Emile Be More

Verso: "Showing bead of moisture ans metaliic dust drawn together by the capillary action of contact space. Width of gap about 1/4000". It was transmitting sound very strong, during and after taking of picture. More

Originally housed in envelop labeled: "Roy M. Allen 1926." Verso: "Roy M. Allen, Bloomfield, N.J., Photomicrograph, subject: A close up of the contacts of Morse key Microphone. No. C-82, magnification 15x." Em More

Verso: "...after microphonic action has been secured by adjustment. Mettalic dust has formed from + electrode. Gap widened to about 1/400" to show magnetic nature of dust. Roy M. Allen, Bloomfield, N.J., Photom More

Originally housed in envelop labeled: "Roy M. Allen 1926." Verso: "Roy M. Allen, Bloomfield, N.J., Photomicrograph, subject: Microphonic Contacts by opaque illumination. No. C-81, magnification 1125x." Emile B More

Originally housed in envelop labeled: "Roy M. Allen 1926." Verso: "Roy M. Allen, Bloomfield, N.J., Photomicrograph, subject: Microphonic Contacts by transmitted light. No. C-80, magnification 540x." Emile Berl More

Public domain photograph of people in office, interior, the 1910s-1920s America, free to use, no copyright restrictions image - Picryl description

Picryl description: Public domain image of a factory, plant, manufacture, assembly line, industrial facility, early 20th-century industrial architecture, free to use, no copyright restrictions.

Picryl description: Public domain image of a factory, plant, manufacture, assembly line, industrial facility, early 20th-century industrial architecture, free to use, no copyright restrictions.

A black and white photo of a man sitting at a bar. Public domain portrait photograph, free to use, no copyright restrictions image - Picryl description

Public domain photograph of a woman, female portrait, free to use, no copyright restrictions image - Picryl description

Original Tennessee Valley Authority (TVA) number: K 1860. Title and other information from caption sheet entry. Transfer; United States. Office of War Information. Overseas Picture Division. Washington Division More

Public domain photograph of 1930s America, free to use, no copyright restrictions image - Picryl description

Public domain photograph of laboratory, scientist, free to use, no copyright restrictions image - Picryl description

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

A black and white photo of a man petting a sheep. Public domain portrait photograph, free to use, no copyright restrictions image - Picryl description

Public domain photograph of people in office, interior, the 1910s-1920s America, free to use, no copyright restrictions image - Picryl description

A black and white photo of a woman putting something in a box. Public domain portrait photograph, free to use, no copyright restrictions image - Picryl description

Photographs Documenting Scientists, Special Events, and Nuclear Research Facilities, Instruments, and Projects at the Berkeley Lab

Two men working on a machine in a factory. Public domain portrait photograph, free to use, no copyright restrictions image - Picryl description

Picryl description: Public domain photograph of coal miners, workers, 1930s, Great Depression, economic conditions, free to use, no copyright restrictions.

Picryl description: Public domain image of a farmer, 1930s, 20th-century dust bowl era, free to use, no copyright restrictions.

Picryl description: Public domain historical photograph of 1930s America during the Great Depression, free to use, no copyright restrictions image.

Public domain photograph of Great Depression, farm, farmer, no copyright restrictions image - Picryl description

Public domain photograph of laboratory, scientist, free to use, no copyright restrictions image - Picryl description

Public domain photograph - United States during the 1930s and 1940s, Farm Security Administration, New Deal, free to use, no copyright restrictions image - Picryl description

Picryl description: Public domain photograph of farming, farmer, agriculture, 20th-century, free to use, no copyright restrictions.

Picryl description: Public domain photograph of a farmer, 1930s, 20th-century great depression era, free to use, no copyright restrictions.

Public domain photograph of people in office, interior, the 1910s-1920s America, free to use, no copyright restrictions image - Picryl description

Picryl description: Public domain photograph of coal miners, workers, 1930s, Great Depression, economic conditions, free to use, no copyright restrictions.

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

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

Public domain photograph of Washington DC, 1910s-1920s America, free to use, no copyright restrictions image - Picryl description

Picryl description: Public domain photograph of a worker, construction, carpenter, 1930s, free to use, no copyright restrictions.

Picryl description: Public domain vintage artistic photograph, free to use, no copyright restrictions image.

Two men standing next to each other holding a chicken. Public domain portrait photograph, free to use, no copyright restrictions image - Picryl description

Photographs Documenting Scientists, Special Events, and Nuclear Research Facilities, Instruments, and Projects at the Berkeley Lab

Photographs Documenting Scientists, Special Events, and Nuclear Research Facilities, Instruments, and Projects at the Berkeley Lab

Public domain photograph - historical image of Alabama, United States, free to use, no copyright restrictions image - Picryl description

Picryl description: Public domain image of a horse, animal husbandry, free to use, no copyright restrictions.

Public domain photograph of 1930s working-class Americans, free to use, no copyright restrictions image - Picryl description

Public domain photograph of laboratory, scientist, free to use, no copyright restrictions image - Picryl description

Picryl description: Public domain image of a political campaign, politician, office meeting, 1930s, mid-20th-century United States, free to use, no copyright restrictions.

A black and white photo of a man in a lab, Library of Congress Harris and Ewing collection Title from unverified caption data received with the Harris & Ewing Collection. Gift; Harris & Ewing, Inc. 1955. Gener More

Photographs Documenting Scientists, Special Events, and Nuclear Research Facilities, Instruments, and Projects at the Berkeley Lab

Picryl description: Public domain image of a worker, labor, factory, plant, manufacture, industrial facility, 1930s, mid-20th-century industrial photo, free to use, no copyright restrictions.

Public domain photograph of laboratory, scientist, free to use, no copyright restrictions image - Picryl description

Picryl description: Public domain photograph of the 1930s - 1940s, woman, female portrait, United States, free to use, no copyright restrictions.

Picryl description: Public domain photograph of the 1930s - 1940s, woman, female portrait, United States, free to use, no copyright restrictions.

Picryl description: Public domain image of a rural countryside landscape, agriculture, farm animals, livestock, pasture, free to use, no copyright restrictions image.

Public domain photograph of laboratory, science, research, free to use, no copyright restrictions image - Picryl description

Public domain photograph of laboratory, science, research, free to use, no copyright restrictions image - Picryl description

Public domain photograph of laboratory, science, research, free to use, no copyright restrictions image - Picryl description

Public domain photograph related to Great Depression, free to use, no copyright restrictions image - Picryl description

[Experiments in Agricultural Productivity in Sologne] - [FRA-7520 through FRA-7544]