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Gears on Tide Predicting Machine No. 2

These gears pass some the energy provided by the operator turning a crank to the rear section of Tide Predicting Machine No. 2, a special purpose mechanical analog computer for predicting the height and 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. These gears pass some the energy provided by the operator turning a crank to the rear section of Tide Predicting Machine No. 2, a special purpose mechanical analog computer for predicting the height and 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.

Low angle view of a wind turbine

Brown/Red rice seeds

Brown/Red rice seeds in a spoon With various spices In low light conditions, rice is ready to be cooked.

Transformers in day

Low voltage electricity post and Transformers in daytime

Two battery charge

Illustration of two-state batteries for energy. Illustration of two-state batteries for energy

Young women jogging along the seafront

Low angle close up of female feet running along the wooden path. Two girls are training near the sea. Low angle close up of female feet running along the wooden path. Two girls are training near the sea

Heart shaped cookies and coffee

Close up background of a sugar coated heart shaped cookies in coffee beans very shallow depth of field and intentional low light. Close up background of a sugar coated heart shaped cookies in coffee beans very shallow depth of field and intentional low light

Cow on green grassy hill with windmills in background, blue sky and clouds. Cow on green grassy hill with windmills in background, blue sky and clouds

Feeling of emptiness blue concept icon. Upset and lonely. Low energy. Exhausted person. Sorrow and frustration. Burnout

Fettuccine with egg and tomato

Pasta fettuccine Italian cuisine, highly nutritious with low fat, perfect for a diet. Pasta fettuccine Italian cuisine, highly nutritious with low fat, perfect for a diet

Burnout vector illustration. Low energy fatigue mother tiny persons concept

Burnout vector illustration. Low energy fatigue mother tiny persons concept

Techno background

Cords inside computer. Low DOF. Cords inside computer. Low DOF

Tired drowsy employee sitting at workplace on Monday. Sleepy woman with low energy at computer desk at work. Bored

Tired drowsy employee sitting at workplace on Monday. Sleepy woman with low energy at computer desk at work. Bored

Mountain landscape

View of the low ridge of Crimean mountains. View of the low ridge of Crimean mountains

Pasta spaghetti Italian cuisine, highly nutritious with low fat, perfect for a diet

Photo of a ewe with two suckling lambs. taken from a low angle with soft focus background. Photo of a ewe with two suckling lambs. taken from a low angle with soft focus background.

Pasta fettuccine Italian cuisine, highly nutritious with low fat, perfect for a diet

Basketball hoop against blue sky from low angle

Vertical collage poster sitting young woman worker employee businesswoman exhausted low energy crisis burnout fire flame

Vertical collage poster sitting young woman worker employee businesswoman exhausted low energy crisis burnout fire flame

Wind turbine in holland near Oesterdam. Wind turbine in holland near Oesterdam

Fluorescent light bulb

Energy saving fluorescent light bulb

Electric pillar and danger sign

Low angel of electric pillar. Low angel of electric pillar

Solar power plant under construction Thailand

Renewable energy, heat, sunlight, solar panels, low voltage systems. Renewable energy, heat, sunlight, solar panels, low voltage systems.

Power lines lead into the sunset

High voltage power lines lead into the distance as the sunsets. Mist hangs in the low areas below the power lines. High voltage power lines lead into the distance as the sunsets. Mist hangs in the low areas below the power lines.

Green Florescent Light Bulb

Glowing energy saving florescent light bulb with a green lightbulb. Glowing energy saving florescent light bulb with a green lightbulb

Basketball hoop against blue sky from low angle. Basketball hoop against blue sky from low angle

Low energy and high energy comparison. A businessman in a tired and energetic state. A happy man successful doing his

Low energy and high energy comparison. A businessman in a tired and energetic state. A happy man successful doing his

Energy-Saving Light Bulb

A compact fluorescent light bulb illuminating a black background. A compact fluorescent light bulb illuminating a black background

Fluorescent light bulb

Energy saving fluorescent light bulb

Tired sad young woman with low energy level and energy happy man. Vector flat modern style illustration character icon

Low-energy house with solar panel and wind turbine

Low-energy house with solar panel and wind turbine

Tesla Model 3 Electric EV Car Charging at Home in Front of Modern Low Energy House with Solar Panels.

Tesla Model 3 Electric EV Car Charging at Home in Front of Modern Low Energy House with Solar Panels.

Energy-Saving Light Bulb

A compact fluorescent light bulb illuminating a black background. A compact fluorescent light bulb illuminating a black background

Old dusted oil lamp - energy. Old dusted oil lamp - energy

Glass disc electrical isolator plates in high voltage overhead electric wires

Glass disc electrical isolator plates in high voltage overhead electric wires. low level abstract view. blue sky above. electricity distribution concept. industries and technology. electricity utility

Fibre optic cascade.

Close and low level capturing blue fibre optic strands cascading down and reflecting into reflective foreground. Black background. Close and low level capturing blue fibre optic strands cascading down and reflecting into reflective foreground. Black background.

Burnout vector illustration. Flat tiny low energy workplace persons concept

Burnout vector illustration. Flat tiny low energy workplace persons concept

Reduce global warming.

Energy saving light bulb or 24 watts of brightness but low power consumption helps reduce global warming.

Low energy warning, replace battery red button, efficient system, charge accumulator, power outage, upgrade and maintenance

Low energy warning, replace battery red button, efficient system, charge accumulator, power outage, upgrade and maintenance

One fill battery in a row of a low batteries

Fluorescent light bulb

Energy saving fluorescent light bulb

Composite collage portrait of two black white effect sad partners low energy charge battery break up divorce isolated on

Composite collage portrait of two black white effect sad partners low energy charge battery break up divorce isolated on

Modern residential buildings with outdoor facilities, Facade of new low-energy house

Modern residential buildings with outdoor facilities, Facade of new low-energy house

Power lines and illuminated street light, low angle view

Alternative Energy

A vertical-axis turbine and solar panel array stand ready to gather green electricity. A vertical-axis turbine and solar panel array stand ready to gather green electricity.

Low energy light bulb hanging in wires outside

Electric pillar and danger sign

Low angel of electric pillar. Low angel of electric pillar

low-energy efficient house, energy saving and self-sufficiency, ecological building at night

low-energy efficient house, energy saving and self-sufficiency, ecological building at night

Techno background

Metal surface. Low DOF, special toned photo f/x. Metal surface. Low DOF, special toned photo f/x

Spaghetti with egg

Pasta spaghetti Italian cuisine, highly nutritious with low fat, perfect for a diet. Pasta spaghetti Italian cuisine, highly nutritious with low fat, perfect for a diet

Electric pillar and danger sign

Low angel of electric pillar. Low angel of electric pillar

Renewable Energy

Solar power station in a field. Solar power station in a field

Pasta fettuccine spaghetti Italian cuisine, highly nutritious with low fat, perfect for a diet

Wind turbine with cloudy blue sky

Alternative power and energy. Alternative power and energy.

Pasta fettuccine Italian cuisine, highly nutritious with low fat, perfect for a diet

Question mark sign of coffee beans

Question mark of dark roasted fair trade coffee beans isolated on white, from a low perspective. Question mark of dark roasted fair trade coffee beans isolated on white, from a low perspective

Electrical installations for energy distribution. Electrical installations for energy distribution

Installing Solar Panels

Technicians installing solar panels, low angle view

Burnout female vector illustration. Low energy workplace tiny person concept

Burnout female vector illustration. Low energy workplace tiny person concept

Abstract, Alternative, Energy

Low energy warning, replace battery red button, efficient system, charge accumulator, power outage, upgrade and maintenance

Low energy warning, replace battery red button, efficient system, charge accumulator, power outage, upgrade and maintenance

Pasta spaghetti Italian cuisine, highly nutritious with low fat, perfect for a diet

High Voltage Electricity Tower

High voltage electric transmission tower or electricity pylon viewed from a low angle and set against a bright, clear blue sky. High voltage electric transmission tower or electricity pylon viewed from a low angle and set against a bright, clear blue sky

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