Displacements Free Stock Images

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Harley-Davidson

Harley-Davidson

Summation Chain

The summation chain runs around pulleys on Tide Predicting Machine No. 2, a special purpose mechanical analog computer for predicting the height and time of high and low tides. The pulleys move up and down and the chain sums their displacements to compute the height or time of high and low tides. The U.S. government used Tide Predicting Machine No. 2 from 1910 to 1965 to predict tides for ports around the world. The machine, also known as “Old Brass Brains,” uses an intricate arrangement of gears, pulleys, chains, slides, and other mechanical components to perform the computations. A person using the machine would require 2-3 days to compute a year’s tides at one location. A person performing the same calculations by hand would require hundreds of days to perform the work. The machine is 10.8 feet (3.3 m) long, 6.2 feet (1.9 m) high, and 2.0 feet (0.61 m) wide and weighs approximately 2,500 pounds (1134 kg). The operator powers the machine with a hand crank.

Railway station ticket office

Railway station ticket office

Rack of colored bicyles in New York city

Rack of colored bicyles in New York city

Railway station and platforms

Railway station and platforms

Impasto Texture

Impasto Texture

High-speed trains at railway station.

High-speed trains at railway station.

Railway end line

Railway end line

Freight train on railway station

Freight train on railway station

Harley-Davidson motorbikes models

Harley-Davidson motorbikes models

The extraordinary route around El Pedraforca

The extraordinary route around El Pedraforca.

Railway station with panel information

Railway station with panel information

Railway station platform with a high-speed train

Railway station platform with a high-speed train

Monument to the memory of Poles from the Zamosc region, victims of German displacements

Monument to the memory of Poles from the Zamosc region, victims of German displacements

Waiting room at railway station

Waiting room at railway station

Harley-Davidson gas tank

Harley-Davidson gas tank

The Armillary Sphere (Ming Dynasty)

The Armillary Sphere (Ming Dynasty)

The extraordinary route around El Pedraforca

The extraordinary route around El Pedraforca.

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