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Daniel Senise releasing hand brakes on a car while at work in an Indiana Harbor Belt Line railroad yard

Daniel Senise releasing hand brakes on a car while at work in an India...

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.

La Cienega Acequia, Truchas Molino, 334 Los Pinos Road, Santa Fe, Santa Fe County, NM

La Cienega Acequia, Truchas Molino, 334 Los Pinos Road, Santa Fe, Sant...

Significance: The Truchas Molino is one of the only example of a Spanish Colonial style grist mills powered by a rodenzo, a horizontal water wheel, that is currently operational in the United States. These moli... More

NASA Langley Research Center, Seaplane Towing Channel, 108 Andrews Street, Hampton, Hampton, Virginia

NASA Langley Research Center, Seaplane Towing Channel, 108 Andrews Str...

Significance: This facility performed an essential function in solving design problems that are unique to seaplanes. Several major principles of seaplane hull configuration were developed at this facility. The... More

NASA Langley Research Center, Seaplane Towing Channel, 108 Andrews Street, Hampton, Hampton, Virginia

NASA Langley Research Center, Seaplane Towing Channel, 108 Andrews Str...

Significance: This facility performed an essential function in solving design problems that are unique to seaplanes. Several major principles of seaplane hull configuration were developed at this facility. The... More

La Cienega Acequia, Truchas Molino, 334 Los Pinos Road, Santa Fe, Santa Fe County, NM

La Cienega Acequia, Truchas Molino, 334 Los Pinos Road, Santa Fe, Sant...

Significance: The Truchas Molino is one of the only example of a Spanish Colonial style grist mills powered by a rodenzo, a horizontal water wheel, that is currently operational in the United States. These moli... More

NASA Langley Research Center, Seaplane Towing Channel, 108 Andrews Street, Hampton, Hampton, Virginia

NASA Langley Research Center, Seaplane Towing Channel, 108 Andrews Str...

Significance: This facility performed an essential function in solving design problems that are unique to seaplanes. Several major principles of seaplane hull configuration were developed at this facility. The... More

La Cienega Acequia, Truchas Molino, 334 Los Pinos Road, Santa Fe, Santa Fe County, NM

La Cienega Acequia, Truchas Molino, 334 Los Pinos Road, Santa Fe, Sant...

Significance: The Truchas Molino is one of the only example of a Spanish Colonial style grist mills powered by a rodenzo, a horizontal water wheel, that is currently operational in the United States. These moli... More

NASA Langley Research Center, Seaplane Towing Channel, 108 Andrews Street, Hampton, Hampton, Virginia

NASA Langley Research Center, Seaplane Towing Channel, 108 Andrews Str...

Significance: This facility performed an essential function in solving design problems that are unique to seaplanes. Several major principles of seaplane hull configuration were developed at this facility. The... More

NASA Langley Research Center, Seaplane Towing Channel, 108 Andrews Street, Hampton, Hampton, Virginia

NASA Langley Research Center, Seaplane Towing Channel, 108 Andrews Str...

Significance: This facility performed an essential function in solving design problems that are unique to seaplanes. Several major principles of seaplane hull configuration were developed at this facility. The... More

Examining brakes of car which will take this family to California near Muskogee, Oklahoma

Examining brakes of car which will take this family to California near...

Public domain photograph of an automobile, car, the 1920s or 1930s, free to use, no copyright restrictions image - Picryl description

Freight operations on the Indiana Harbor Belt railroad between Chicago, Illinois and Hammond, Indiana. The conductor uses hand brakes on the caboose to stop it as it coasts down a siding

Freight operations on the Indiana Harbor Belt railroad between Chicago...

Picryl description: Public domain image of workers, labor, 1940s, economic conditions, free to use, no copyright restrictions.

La Cienega Acequia, Truchas Molino, 334 Los Pinos Road, Santa Fe, Santa Fe County, NM

La Cienega Acequia, Truchas Molino, 334 Los Pinos Road, Santa Fe, Sant...

Significance: The Truchas Molino is one of the only example of a Spanish Colonial style grist mills powered by a rodenzo, a horizontal water wheel, that is currently operational in the United States. These moli... More

La Cienega Acequia, Truchas Molino, 334 Los Pinos Road, Santa Fe, Santa Fe County, NM

La Cienega Acequia, Truchas Molino, 334 Los Pinos Road, Santa Fe, Sant...

Significance: The Truchas Molino is one of the only example of a Spanish Colonial style grist mills powered by a rodenzo, a horizontal water wheel, that is currently operational in the United States. These moli... More

NASA Langley Research Center, Seaplane Towing Channel, 108 Andrews Street, Hampton, Hampton, Virginia

NASA Langley Research Center, Seaplane Towing Channel, 108 Andrews Str...

Significance: This facility performed an essential function in solving design problems that are unique to seaplanes. Several major principles of seaplane hull configuration were developed at this facility. The... More

NASA Langley Research Center, Seaplane Towing Channel, 108 Andrews Street, Hampton, Hampton, Virginia

NASA Langley Research Center, Seaplane Towing Channel, 108 Andrews Str...

Significance: This facility performed an essential function in solving design problems that are unique to seaplanes. Several major principles of seaplane hull configuration were developed at this facility. The... More

NASA Langley Research Center, Seaplane Towing Channel, 108 Andrews Street, Hampton, Hampton, Virginia

NASA Langley Research Center, Seaplane Towing Channel, 108 Andrews Str...

Significance: This facility performed an essential function in solving design problems that are unique to seaplanes. Several major principles of seaplane hull configuration were developed at this facility. The... More

Freight operations on the Indiana Harbor Belt railroad between Chicago, Illinois and Hammond, Indiana. Part of the train inspection consists of releasing the hand brakes

Freight operations on the Indiana Harbor Belt railroad between Chicago...

Public domain photograph - New York, United States, free to use, no copyright restrictions image - Picryl description

La Cienega Acequia, Truchas Molino, 334 Los Pinos Road, Santa Fe, Santa Fe County, NM

La Cienega Acequia, Truchas Molino, 334 Los Pinos Road, Santa Fe, Sant...

Significance: The Truchas Molino is one of the only example of a Spanish Colonial style grist mills powered by a rodenzo, a horizontal water wheel, that is currently operational in the United States. These moli... More

NASA Langley Research Center, Seaplane Towing Channel, 108 Andrews Street, Hampton, Hampton, Virginia

NASA Langley Research Center, Seaplane Towing Channel, 108 Andrews Str...

Significance: This facility performed an essential function in solving design problems that are unique to seaplanes. Several major principles of seaplane hull configuration were developed at this facility. The... More

NASA Langley Research Center, Seaplane Towing Channel, 108 Andrews Street, Hampton, Hampton, Virginia

NASA Langley Research Center, Seaplane Towing Channel, 108 Andrews Str...

Significance: This facility performed an essential function in solving design problems that are unique to seaplanes. Several major principles of seaplane hull configuration were developed at this facility. The... More

NASA Langley Research Center, Seaplane Towing Channel, 108 Andrews Street, Hampton, Hampton, Virginia

NASA Langley Research Center, Seaplane Towing Channel, 108 Andrews Str...

Significance: This facility performed an essential function in solving design problems that are unique to seaplanes. Several major principles of seaplane hull configuration were developed at this facility. The... More

Funky brake shop, San Francisco, California

Funky brake shop, San Francisco, California

Digital image produced by Carol M. Highsmith to represent her original film transparency; some details may differ between the film and the digital images. Title, date, and keywords based on information provided... More

NASA Langley Research Center, Seaplane Towing Channel, 108 Andrews Street, Hampton, Hampton, Virginia

NASA Langley Research Center, Seaplane Towing Channel, 108 Andrews Str...

Significance: This facility performed an essential function in solving design problems that are unique to seaplanes. Several major principles of seaplane hull configuration were developed at this facility. The... More

NASA Langley Research Center, Seaplane Towing Channel, 108 Andrews Street, Hampton, Hampton, Virginia

NASA Langley Research Center, Seaplane Towing Channel, 108 Andrews Str...

Significance: This facility performed an essential function in solving design problems that are unique to seaplanes. Several major principles of seaplane hull configuration were developed at this facility. The... More

Freight train operations on the Chicago and Northwestern Railroad between Chicago and Clinton, Iowa. The rear brakeman signals the engineer to apply and release the brakes as a test. This is the "release" sign

Freight train operations on the Chicago and Northwestern Railroad betw...

Public domain image of Chicago city buildings, cityscape, free to use, no copyright restrictions image - Picryl description

Joilet, Illinois. Conductor giving the brakeman the signal to apply and release the brakes before the train leaves on the Atchison, Topeka and Santa Fe

Joilet, Illinois. Conductor giving the brakeman the signal to apply an...

Public domain photograph of train car, engine, locomotive, free to use, no copyright restrictions image - Picryl description

NASA Langley Research Center, Seaplane Towing Channel, 108 Andrews Street, Hampton, Hampton, Virginia

NASA Langley Research Center, Seaplane Towing Channel, 108 Andrews Str...

Significance: This facility performed an essential function in solving design problems that are unique to seaplanes. Several major principles of seaplane hull configuration were developed at this facility. The... More

NASA Langley Research Center, Seaplane Towing Channel, 108 Andrews Street, Hampton, Hampton, Virginia

NASA Langley Research Center, Seaplane Towing Channel, 108 Andrews Str...

Significance: This facility performed an essential function in solving design problems that are unique to seaplanes. Several major principles of seaplane hull configuration were developed at this facility. The... More

NASA Langley Research Center, Seaplane Towing Channel, 108 Andrews Street, Hampton, Hampton, Virginia

NASA Langley Research Center, Seaplane Towing Channel, 108 Andrews Str...

Significance: This facility performed an essential function in solving design problems that are unique to seaplanes. Several major principles of seaplane hull configuration were developed at this facility. The... More

NASA Langley Research Center, Seaplane Towing Channel, 108 Andrews Street, Hampton, Hampton, Virginia

NASA Langley Research Center, Seaplane Towing Channel, 108 Andrews Str...

Significance: This facility performed an essential function in solving design problems that are unique to seaplanes. Several major principles of seaplane hull configuration were developed at this facility. The... More

La Cienega Acequia, Truchas Molino, 334 Los Pinos Road, Santa Fe, Santa Fe County, NM

La Cienega Acequia, Truchas Molino, 334 Los Pinos Road, Santa Fe, Sant...

Significance: The Truchas Molino is one of the only example of a Spanish Colonial style grist mills powered by a rodenzo, a horizontal water wheel, that is currently operational in the United States. These moli... More

NASA Langley Research Center, Seaplane Towing Channel, 108 Andrews Street, Hampton, Hampton, Virginia

NASA Langley Research Center, Seaplane Towing Channel, 108 Andrews Str...

Significance: This facility performed an essential function in solving design problems that are unique to seaplanes. Several major principles of seaplane hull configuration were developed at this facility. The... More

Army truck manufacture (Dodge). Trucks built for the U.S. Army by Dodge are tested on this ramp to make sure that all of them are able to meet the Army specifications of climbing a sixty percent grade. Brakes are also tested at the same time to make sure of their ability to hold the truck on any part of this tremendously steep incline

Army truck manufacture (Dodge). Trucks built for the U.S. Army by Dodg...

Public domain photograph of the 1930s-1940s World War Two, armed forces, military production, no copyright restrictions image - Picryl description

YB-17 bombardment squadron, Langley Field, Virginia. Brakes on the landing gear of a YB-17 bomber. A sergeant of a bombardment squadron at Langley Field, Virginia makes adjustments that will help this big warship  of the air to land smoothly

YB-17 bombardment squadron, Langley Field, Virginia. Brakes on the lan...

Picryl description: Public domain image of a bomber aircraft, military aviation, air forces, free to use, no copyright restrictions.

La Cienega Acequia, Truchas Molino, 334 Los Pinos Road, Santa Fe, Santa Fe County, NM

La Cienega Acequia, Truchas Molino, 334 Los Pinos Road, Santa Fe, Sant...

Significance: The Truchas Molino is one of the only example of a Spanish Colonial style grist mills powered by a rodenzo, a horizontal water wheel, that is currently operational in the United States. These moli... More

NASA Langley Research Center, Seaplane Towing Channel, 108 Andrews Street, Hampton, Hampton, Virginia

NASA Langley Research Center, Seaplane Towing Channel, 108 Andrews Str...

Significance: This facility performed an essential function in solving design problems that are unique to seaplanes. Several major principles of seaplane hull configuration were developed at this facility. The... More

NASA Langley Research Center, Seaplane Towing Channel, 108 Andrews Street, Hampton, Hampton, Virginia

NASA Langley Research Center, Seaplane Towing Channel, 108 Andrews Str...

Significance: This facility performed an essential function in solving design problems that are unique to seaplanes. Several major principles of seaplane hull configuration were developed at this facility. The... More

Freight operations on the Chicago and Northwestern Railroad between Chicago and Clinton, Iowa. The rear brakeman signals the engineer to test the brakes by applying and releasing them. This is the signal for "apply"

Freight operations on the Chicago and Northwestern Railroad between Ch...

Picryl description: Public domain image of an industrial equipment, workshop, assembly line, factory, power engine, 19th-20th century, free to use, no copyright restrictions.

NASA Langley Research Center, Seaplane Towing Channel, 108 Andrews Street, Hampton, Hampton, Virginia

NASA Langley Research Center, Seaplane Towing Channel, 108 Andrews Str...

Significance: This facility performed an essential function in solving design problems that are unique to seaplanes. Several major principles of seaplane hull configuration were developed at this facility. The... More

Joliet, Illinois. A conductor giving an engineer the signal to apply and release the brakes before the train leaves on the Atchison, Topeka, and Santa Fe Railroad between Chicago and Chillicothe, Illinois

Joliet, Illinois. A conductor giving an engineer the signal to apply a...

Public domain photograph of diesel or electric train engine, free to use, no copyright restrictions image - Picryl description

La Cienega Acequia, Truchas Molino, 334 Los Pinos Road, Santa Fe, Santa Fe County, NM

La Cienega Acequia, Truchas Molino, 334 Los Pinos Road, Santa Fe, Sant...

Significance: The Truchas Molino is one of the only example of a Spanish Colonial style grist mills powered by a rodenzo, a horizontal water wheel, that is currently operational in the United States. These moli... More

A black and white photo of a man pointing at a train. Office of War Information Photograph

A black and white photo of a man pointing at a train. Office of War In...

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

NASA Langley Research Center, Seaplane Towing Channel, 108 Andrews Street, Hampton, Hampton, Virginia

NASA Langley Research Center, Seaplane Towing Channel, 108 Andrews Str...

Significance: This facility performed an essential function in solving design problems that are unique to seaplanes. Several major principles of seaplane hull configuration were developed at this facility. The... More

NASA Langley Research Center, Seaplane Towing Channel, 108 Andrews Street, Hampton, Hampton, Virginia

NASA Langley Research Center, Seaplane Towing Channel, 108 Andrews Str...

Significance: This facility performed an essential function in solving design problems that are unique to seaplanes. Several major principles of seaplane hull configuration were developed at this facility. The... More

Anaconda smelter, Montana. Anaconda Copper Mining Company. Brakeman setting the brakes on an ore car in the unloading mechanism which will dump the ore into a 200 ton hopper

Anaconda smelter, Montana. Anaconda Copper Mining Company. Brakeman se...

Picryl description: Public domain image of an industrial building, factory, workshop, workers, 19th-20th century, free to use, no copyright restrictions.

Chicago, Illinois. Workmen going out to inspect journal boxes, brakes, etc. at a Chicago and Northwestern Railroad yard

Chicago, Illinois. Workmen going out to inspect journal boxes, brakes,...

Public domain photograph of train car, railroad, free to use, no copyright restrictions image - Picryl description

NASA Langley Research Center, Seaplane Towing Channel, 108 Andrews Street, Hampton, Hampton, Virginia

NASA Langley Research Center, Seaplane Towing Channel, 108 Andrews Str...

Significance: This facility performed an essential function in solving design problems that are unique to seaplanes. Several major principles of seaplane hull configuration were developed at this facility. The... More

La Cienega Acequia, Truchas Molino, 334 Los Pinos Road, Santa Fe, Santa Fe County, NM

La Cienega Acequia, Truchas Molino, 334 Los Pinos Road, Santa Fe, Sant...

Significance: The Truchas Molino is one of the only example of a Spanish Colonial style grist mills powered by a rodenzo, a horizontal water wheel, that is currently operational in the United States. These moli... More

La Cienega Acequia, Truchas Molino, 334 Los Pinos Road, Santa Fe, Santa Fe County, NM

La Cienega Acequia, Truchas Molino, 334 Los Pinos Road, Santa Fe, Sant...

Significance: The Truchas Molino is one of the only example of a Spanish Colonial style grist mills powered by a rodenzo, a horizontal water wheel, that is currently operational in the United States. These moli... More

La Cienega Acequia, Truchas Molino, 334 Los Pinos Road, Santa Fe, Santa Fe County, NM

La Cienega Acequia, Truchas Molino, 334 Los Pinos Road, Santa Fe, Sant...

Significance: The Truchas Molino is one of the only example of a Spanish Colonial style grist mills powered by a rodenzo, a horizontal water wheel, that is currently operational in the United States. These moli... More

NASA Langley Research Center, Seaplane Towing Channel, 108 Andrews Street, Hampton, Hampton, Virginia

NASA Langley Research Center, Seaplane Towing Channel, 108 Andrews Str...

Significance: This facility performed an essential function in solving design problems that are unique to seaplanes. Several major principles of seaplane hull configuration were developed at this facility. The... More

La Cienega Acequia, Truchas Molino, 334 Los Pinos Road, Santa Fe, Santa Fe County, NM

La Cienega Acequia, Truchas Molino, 334 Los Pinos Road, Santa Fe, Sant...

Significance: The Truchas Molino is one of the only example of a Spanish Colonial style grist mills powered by a rodenzo, a horizontal water wheel, that is currently operational in the United States. These moli... More

NASA Langley Research Center, Seaplane Towing Channel, 108 Andrews Street, Hampton, Hampton, Virginia

NASA Langley Research Center, Seaplane Towing Channel, 108 Andrews Str...

Significance: This facility performed an essential function in solving design problems that are unique to seaplanes. Several major principles of seaplane hull configuration were developed at this facility. The... More

NASA Langley Research Center, Seaplane Towing Channel, 108 Andrews Street, Hampton, Hampton, Virginia

NASA Langley Research Center, Seaplane Towing Channel, 108 Andrews Str...

Significance: This facility performed an essential function in solving design problems that are unique to seaplanes. Several major principles of seaplane hull configuration were developed at this facility. The... More