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[Pendulum or oscillating clock mechanisms, showing escapement mechanism, curved metal strips to check swing of pendulum, and clock with pendulum and weights]

[Pendulum or oscillating clock mechanisms, showing escapement mechanis...

Illus. in: Horologium oscillatorium / Christiaan Huygens. Parisiis : Apud F. Muguet, 1673. Published in: The tradition of science / Leonard C. Bruno. Washington, D.C. : Library of Congress, 1987, p. 272.

Gyro Mechanisms, Halesite, Huntington, Long Island. Sandburn

Gyro Mechanisms, Halesite, Huntington, Long Island. Sandburn

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

Gyro Mechanisms, Halesite, Huntington, Long Island. Do-all machine

Gyro Mechanisms, Halesite, Huntington, Long Island. Do-all machine

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.

Gyro Mechanisms, Halesite, Huntington, Long Island. General view of assembly

Gyro Mechanisms, Halesite, Huntington, Long Island. General view of as...

Public domain photograph of industrial architecture, factory building, free to use, no copyright restrictions image - Picryl description

Gyro Mechanisms, Halesite, Huntington, Long Island. Drafting room

Gyro Mechanisms, Halesite, Huntington, Long Island. Drafting room

Public domain photograph of industrial architecture, factory building, free to use, no copyright restrictions image - Picryl description

[Details of the mechanisms of the Leibniz calculator, the most advanced of its time]

[Details of the mechanisms of the Leibniz calculator, the most advance...

Picryl description: Public domain illustrated book page scan, engraving, free to use art, no copyright restrictions image.

Washington Water Power Spokane River Upper Falls Hydroelectric Development, Gates & Gate-Lifting Mechanisms, Spokane River, approximately 0.5 mile northeast of intersection of Spokane Falls Boulevard & Post Street, Spokane, Spokane County, WA

Washington Water Power Spokane River Upper Falls Hydroelectric Develop...

Significance: Washington Water Power's south channel dam, gate house, gates, and associated lifting mechanisms are the elements which control the flow of water from the south channel of the Spokane River into t... More

Production. Airplane propellers. Ed Dimlow, makes a final inspection of a two-blade airplane propeller in the vertical position. The Hartford, Connecticut, plant that produces these blades supplies them to our air forces in combinations with two, three or four blades, and with hydromatic mechanisms that permit adjusting blade pitch while planes are in action

Production. Airplane propellers. Ed Dimlow, makes a final inspection o...

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

Washington Water Power Spokane River Upper Falls Hydroelectric Development, Gates & Gate-Lifting Mechanisms, Spokane River, approximately 0.5 mile northeast of intersection of Spokane Falls Boulevard & Post Street, Spokane, Spokane County, WA

Washington Water Power Spokane River Upper Falls Hydroelectric Develop...

Significance: Washington Water Power's south channel dam, gate house, gates, and associated lifting mechanisms are the elements which control the flow of water from the south channel of the Spokane River into t... More

Gyro Mechanisms, Halesite, Huntington, Long Island. Van Norm

Gyro Mechanisms, Halesite, Huntington, Long Island. Van Norm

Public domain photograph of industrial architecture, factory building, free to use, no copyright restrictions image - Picryl description

Gyro Mechanisms, Halesite, Huntington, Long Island. Jig borer

Gyro Mechanisms, Halesite, Huntington, Long Island. Jig borer

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

Washington Water Power Spokane River Upper Falls Hydroelectric Development, Gates & Gate-Lifting Mechanisms, Spokane River, approximately 0.5 mile northeast of intersection of Spokane Falls Boulevard & Post Street, Spokane, Spokane County, WA

Washington Water Power Spokane River Upper Falls Hydroelectric Develop...

Significance: Washington Water Power's south channel dam, gate house, gates, and associated lifting mechanisms are the elements which control the flow of water from the south channel of the Spokane River into t... More

Production. Airplane propellers. Finished propeller blades ready for assembly at a Hartford, Connecticut, plant. These blades will later be mounted in combinations of two, three and four in hydromatic mechanisms that permit adjustments of blade pitch while planes are in action

Production. Airplane propellers. Finished propeller blades ready for a...

Public domain photograph of manufacturing, industry, free to use, no copyright restrictions image - Picryl description

Washington Water Power Spokane River Upper Falls Hydroelectric Development, Gates & Gate-Lifting Mechanisms, Spokane River, approximately 0.5 mile northeast of intersection of Spokane Falls Boulevard & Post Street, Spokane, Spokane County, WA

Washington Water Power Spokane River Upper Falls Hydroelectric Develop...

Significance: Washington Water Power's south channel dam, gate house, gates, and associated lifting mechanisms are the elements which control the flow of water from the south channel of the Spokane River into t... More

Washington Water Power Spokane River Upper Falls Hydroelectric Development, Gates & Gate-Lifting Mechanisms, Spokane River, approximately 0.5 mile northeast of intersection of Spokane Falls Boulevard & Post Street, Spokane, Spokane County, WA

Washington Water Power Spokane River Upper Falls Hydroelectric Develop...

Significance: Washington Water Power's south channel dam, gate house, gates, and associated lifting mechanisms are the elements which control the flow of water from the south channel of the Spokane River into t... More

Gyro Mechanisms, Halesite, Huntington, Long Island. Row of lathes

Gyro Mechanisms, Halesite, Huntington, Long Island. Row of lathes

Public domain photograph of industrial architecture, factory building, free to use, no copyright restrictions image - Picryl description

Gyro Mechanisms, Halesite, Huntington, Long Island. Inspection

Gyro Mechanisms, Halesite, Huntington, Long Island. Inspection

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

Gyro Mechanisms, Halesite, Huntington, Long Island. Mrs. Stites

Gyro Mechanisms, Halesite, Huntington, Long Island. Mrs. Stites

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

Production. Airplane propellers. Finished propeller blades ready for assembly at a Hartford, Connecticut, plant. These blades will later be mounted in combinations of two, three and four in hydromatic mechanisms that permit adjustments of blade pitch while planes are in action

Production. Airplane propellers. Finished propeller blades ready for a...

Public domain photograph of manufacturing, industry, free to use, no copyright restrictions image - Picryl description