operation

Delta cooperative farm cabins and cotton. Hillhouse, Mississippi, afte...

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

Aerators. General view from Middle dike of Ashokan reservoir shoeing t...

Picryl description: Public domain image of a stadium, public building, sports arena, free to use, no copyright restrictions.

Aerators. View showing Kensico aerator in operation. ... Contract 55...

Public domain scan of artwork related to technological or industrial history, free to use, no copyright restrictions image - Picryl description

Post route map of the states of Kansas and Nebraska : showing post off...

Public domain image of the vintage map from NYPL Lionel Pincus and Princess Firyal Map Division, free to use, no copyright restrictions image. The Lionel Pincus and Princess Firyal Map Division is one of the wo... More

Aerators. View looking towards Ashokan Screen chamber showing aerator ...

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

umerus removed from right arm of John F. Claghorn, 214 Gold St. Brookl...

The albumen silver print is a photographic printing process that was widely used in the 19th century. It involves coating paper support with a mixture of egg whites and salt, which creates a glossy surface to h... More

Wallkill pressure tunnel. View showing "trailing" method of placing co...

Picryl description: Public domain image of a mining, coal mine, underground, free to use, no copyright restrictions.

Map of all the railroads in the United States in operation & progress

Public domain image of the vintage map from NYPL Lionel Pincus and Princess Firyal Map Division, free to use, no copyright restrictions image. The Lionel Pincus and Princess Firyal Map Division is one of the wo... More

umerus removed from right arm of John F. Claghorn, 214 Gold St. Brookl...

The albumen silver print is a photographic printing process that was widely used in the 19th century. It involves coating paper support with a mixture of egg whites and salt, which creates a glossy surface to h... More

Picryl description: Public domain image, drawing, American, 19th centu...

Picryl description: Public domain image, drawing, American, free to use, no copyright restrictions

Wallkill pressure tunnel. View showing full-section steel forms in pla...

Picryl description: Public domain image of an arch stone structure, bridge, or tunnel, free to use, no copyright restrictions.

Rondout pressure tunnel. Tunnel excavation showing operation on both ...

Picryl description: Public domain image of an arch stone structure, bridge, or tunnel, free to use, no copyright restrictions.

Map of all the railroads in the United States in operation & progress

Public domain image of the vintage map from NYPL Lionel Pincus and Princess Firyal Map Division, free to use, no copyright restrictions image. The Lionel Pincus and Princess Firyal Map Division is one of the wo... More

Map of all the railroads in the United States in operation & progress

Public domain image of the vintage map from NYPL Lionel Pincus and Princess Firyal Map Division, free to use, no copyright restrictions image. The Lionel Pincus and Princess Firyal Map Division is one of the wo... More

Post route map of the states of Kansas and Nebraska : showing post off...

Public domain image of the vintage map from NYPL Lionel Pincus and Princess Firyal Map Division, free to use, no copyright restrictions image. The Lionel Pincus and Princess Firyal Map Division is one of the wo... More

Post route map of the states of Kansas and Nebraska : showing post off...

Public domain image of the vintage map from NYPL Lionel Pincus and Princess Firyal Map Division, free to use, no copyright restrictions image. The Lionel Pincus and Princess Firyal Map Division is one of the wo... More

Post route map of the states of Kansas and Nebraska : showing post off...

Public domain image of the vintage map from NYPL Lionel Pincus and Princess Firyal Map Division, free to use, no copyright restrictions image. The Lionel Pincus and Princess Firyal Map Division is one of the wo... More

Post route map of the states of Kansas and Nebraska : showing post off...

Public domain image of the vintage map from NYPL Lionel Pincus and Princess Firyal Map Division, free to use, no copyright restrictions image. The Lionel Pincus and Princess Firyal Map Division is one of the wo... More

Map of all the railroads in the United States in operation & progress

Public domain image of the vintage map from NYPL Lionel Pincus and Princess Firyal Map Division, free to use, no copyright restrictions image. The Lionel Pincus and Princess Firyal Map Division is one of the wo... More

umerus removed from right arm of John F. Claghorn, 214 Gold St. Brookl...

Humerus removed from right arm of John F. Claghorn, 214 Gold St. Brook...

The albumen silver print is a photographic printing process that was widely used in the 19th century. It involves coating paper support with a mixture of egg whites and salt, which creates a glossy surface to h... More

Aerators. View looking towards the Middle dike, showing Ashokan aerato...

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

Post route map of the states of Kansas and Nebraska : showing post off...

Public domain image of the vintage map from NYPL Lionel Pincus and Princess Firyal Map Division, free to use, no copyright restrictions image. The Lionel Pincus and Princess Firyal Map Division is one of the wo... More

Map of all the railroads in the United States in operation & progress

Public domain image of the vintage map from NYPL Lionel Pincus and Princess Firyal Map Division, free to use, no copyright restrictions image. The Lionel Pincus and Princess Firyal Map Division is one of the wo... More

Map of all the railroads in the United States in operation & progress

Public domain image of the vintage map from NYPL Lionel Pincus and Princess Firyal Map Division, free to use, no copyright restrictions image. The Lionel Pincus and Princess Firyal Map Division is one of the wo... More

Post route map of the states of Kansas and Nebraska : showing post off...

Public domain image of the vintage map from NYPL Lionel Pincus and Princess Firyal Map Division, free to use, no copyright restrictions image. The Lionel Pincus and Princess Firyal Map Division is one of the wo... More

Map of all the railroads in the United States in operation & progress

Public domain image of the vintage map from NYPL Lionel Pincus and Princess Firyal Map Division, free to use, no copyright restrictions image. The Lionel Pincus and Princess Firyal Map Division is one of the wo... More

Post route map of the states of Kansas and Nebraska : showing post off...

Public domain scan of a vintage map, plan, atlas, free to use, no copyright restrictions - Picryl description.

Map of all the railroads in the United States in operation & progress

Public domain image of the vintage map from NYPL Lionel Pincus and Princess Firyal Map Division, free to use, no copyright restrictions image. The Lionel Pincus and Princess Firyal Map Division is one of the wo... More

Post route map of the states of Kansas and Nebraska : showing post off...

Public domain scan of a vintage map, plan, atlas, free to use, no copyright restrictions - Picryl description.

umerus removed from right arm of John F. Claghorn, 214 Gold St. Brookl...

Delta cooperative farm cabins and cotton. Hillhouse, Mississippi, afte...

Picryl description: Public domain image of a rural landscape, farmhouse, pasture, farm field, free to use, no copyright restrictions.

Post route map of the states of Kansas and Nebraska : showing post off...

Public domain image of the vintage map from NYPL Lionel Pincus and Princess Firyal Map Division, free to use, no copyright restrictions image. The Lionel Pincus and Princess Firyal Map Division is one of the wo... More

Transport des antiquités. 1. Transport sur kélek d'après un bas relief...

Public domain reproduction of artwork related to Ancient Assyria civilization, free to use, no copyright restrictions image - Picryl description