Hardness, S - State: [Blank] - Year: [Blank]
Papers Relating to Citizens
Possible key metal monopoly committee's study. Washington, D.C., May 8...
Picryl description: Public domain historical photo of Washington DC during the First World War, free to use, no copyright restrictions image.
Airplanes - Instruments - Hardness test in aeroplane construction, For...
Photographer: Forest Products Laboratory, Madison, Wis. Airplanes - Instruments Public domain photograph related to the United States in World War One, free to use, no copyright restrictions image - Picryl description
Government discovers method to preserve film. Scratch resistance, film...
Public domain photograph of laboratory, scientist, free to use, no copyright restrictions image - Picryl description
Tough steel for a tough job. It takes tough steel to stand up in a Gar...
Public domain photograph of indoor, interior activity, America in the 1930s, free to use, no copyright restrictions image - Picryl description
Production. Pratt and Whitney airplane engines. A gear for a Pratt and...
Public domain photograph of aircraft engine, free to use, no copyright restrictions image - Picryl description
Aluminum casting. The heads of these heat-treated pistons must be spot...
Picryl description: Public domain image of a woman working, women labor, 1940s, economic conditions, home front, world war two, free to use, no copyright restrictions.
Production. Pratt and Whitney airplane engines. A gear for a Pratt and...
Public domain photograph of aircraft engine, free to use, no copyright restrictions image - Picryl description
Conversion. Copper and brass processing. This sample of brass strip is...
Picryl description: Public domain photograph of an office worker, 1930s, free to use, no copyright restrictions.
Conversion. Soft drink dispenser plant. The vice-president of an Easte...
Public domain photograph of New York in 1930s, free to use, no copyright restrictions image - Picryl description
Production. Willow Run bomber plant. Experienced women workers at the ...
Picryl description: Public domain image of an industrial building, factory, workshop, workers, 19th-20th century, free to use, no copyright restrictions.
Production. War housing trailers. The top of a war housing trailer is ...
Picryl description: Public domain image of an automobile, 1940s car, free to use, no copyright restrictions.
Production. Airplane manufacture, general. Testing plane parts for har...
Picryl description: Public domain image of the British Empire armed forces, 19th-20th century war and military conflict, free to use, no copyright restrictions.
Production. War housing trailers. Paper replaces steel as material for...
Public domain photograph related to Great Depression, free to use, no copyright restrictions image - Picryl description
Production. Pratt and Whitney airplane engines. Magneto driving gears ...
Picryl description: Public domain image of a factory worker, plant, manufacture, assembly line, industrial facility, early 20th-century industrial architecture, free to use, no copyright restrictions. show less
Detroit, Michigan. Assembly of Rolls Royce engines at the Packard Moto...
Public domain photograph of 1930s industry, war production in the United States free to use, no copyright restrictions image - Picryl description
Detroit, Michigan. Assembly of Rolls Royce engines at the Packard Moto...
Title and other information from caption card. Transfer; United States. Office of War Information. Overseas Picture Division. Washington Division; 1944. More information about the FSA/OWI Collection is availabl... More
Detroit, Michigan. Assembly of Rolls Royce engines at the Packard Moto...
Public domain photograph of indoor, interior activity, America in the 1930s, free to use, no copyright restrictions image - Picryl description
New York, New York. Class in the use of precision instruments, part of...
Public domain photograph of New York in 1930s, free to use, no copyright restrictions image - Picryl description
Detroit, Michigan. Assembly of Rolls Royce engines at the Packard Moto...
Title and other information from caption card. Transfer; United States. Office of War Information. Overseas Picture Division. Washington Division; 1944. More information about the FSA/OWI Collection is availabl... More
Pittsburgh Plate Glass Co., Columbia Chemical Division, Barberton, Ohi...
Public domain photograph of industrial architecture, factory building, free to use, no copyright restrictions image - Picryl description
Jämförelsetabell mellan Brinell-Rockwell-Shore, hårdhet och draghållfa...
Jämförelsetabell mellan Brinell-Rockwell-Shore, hårdhet och draghållfasthet
A close up of a person pointing a finger at the camera. Rage fight fau...
Fear. Free images of fear. Use free photos of people in fear without any copyright restrictions.
A man flexing his arm in front of a wall. Muscle biceps force.
A man's arm with a big biceps / A man's arm in a fist / Public domain sport photography.
A man standing in front of a chalk drawing of a man's arm. Man board d...
A man in a hoodie standing in front of a blackboard with two large muscles / A man in a hoodie standing in front of a chalkboard with two strong muscles / Public domain sport photography.
Tensile-strength testing machine ; Hardness testers ; Impact tester.
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.
Barytocalcite 1 - Public domain book illustration
Illustration from 1911 Encyclopædia Britannica, article BARYTOCALCITE. The crystals belong to the monoclinic system and are usually prismatic or blade-shaped in habit. The hardness is 4, and the sp. gr. 3.65. T... More