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Fairmont Water Works & Schuylkill LocksWell-dressed people walk along the bank of the Schuylkill River and look across at the Fairmont Water Works and the Schuylkill locks, Phildelphia, Pennsylvania, 1800s
Fairmont Water WorksThree people row their boats in the Schuylkill River on the bank of which sits the Fairmont Water Works, Phildelphia, Pennsylvania, 1800s. (Kean Collection/Hulton Archive/Getty Images)
Reservoir At Reade & Centre StreetsPedestrians walk past the Reservoir at Reade & Centre streets, New York, New York, 1866. (Kean Collection/Getty Images)
View Of Manhattan ReservoirPedestrians and carriages travel past the Manhattan Reservoir on Chambers Street near Centre Street, January 1882. (Kean Collection/Getty Images)
Interior Of The Fairmont Water WorksWell-dressed people tour the inside of the Fairmont Water Works and examine its water wheel and pump system, Phildelphia, Pennsylvania, 1853. (Kean Collection/Hulton Archive/Getty Images)
Pipe Chambers In Central Park ReservoirView of the pipe chambers in the Central Park Reservoir, New York, New York, 1862. (Kean Collection/Getty Images)
Exterior View Of Central Park ReservoirView of the Central Park Reservoir as several people walk nearby, New York, New York, 1862. (Kean Collection/Getty Images)
Fire EngineIllustration of Silsby, Mynderse and Cos steam fire engine as seen in Scientific American on February 25, 1860. (Photo by Kean Collection/Getty Images)
Electric Light MachineIllustration of Holmes Magneto Electric Light Apparatus which was exhibited at the International Exhibition in 1862. (Photo by Kean Collection/Getty Images)
Colourful BridgeA colourful Southwark Bridge leads from the bankside up to the Vintners Hall. Southwark Bridge is an arch bridge for traffic linking Southwark and the City across the River Thames, in London
Yellow bulldozer
Orange cement truck, side view
Red cement truck, side view
Set of interlocking Gears
Robots manufacturing car on production line, side view
Diagram of backhoe loader depicting both the digging and loading positions of the front and back arms, side view
Yellow backhoe loader, rear view
Yellow backhoe loader
Yellow bulldozer shovelling earth, side view
Yellow excavator picking up earth with its long arm
Green mini-excavator, side view
Yellow grapple of an excavator in open position
Yellow grapple of an excavator in close position
Colourful cement mixer, side view
Skid steer, side view
Blue truck crane, side view
Yellow wheel loader, side view
Red mining shovel with bucket full of earth
Green scraper with basin full of earth, side view
Two yellow skips loaded onto red refuse truck, rear view
Gold mine, overground site with buildings and rubble heaps, underground cross section
Cars and lorry driving along three-lane motorway cutting through countryside
Diagram of a DC electric motor and battery
Field of modern windmills
Passenger jet, low angle view
Illustration, generator
Water power generator, cross-section
Helicopter in flight, and diagram of rotor blades
Various railway bridges
Assembly line in car production factory
Suspension bridge across water
Dam
Gravity dam
Illustration of water-powered turbine generator
Illustration of how a jet engine works
Illustration of overshot water wheel and undershot water wheel
Illustration of differential gearing on a car wheel
Sequence of illustrations showing slaves pulling stone, Trevithicks locomotive, Stephensons Rocket