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Tide Predicting Machine No. 2 ("Old Brass Brains"&#x29

Tide Predicting Machine No. 2 is a special purpose mechanical analog computer for predicting the height and time of high and low tides. When the machine was routinely used, the operator would sit at the desk and turn the crank on the left, which powered the machine. Mechanical components, partially visible on the left, computed the height of tides. These were displayed on the paper tide curve visible at the top right and on the dial below the paper. 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 â€œOld Brass Brains,â€ 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 yearâ€™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. The National Oceanic and Atmospheric Administration (NOAA) occasionally displays the machine at its facility in Silver Spring, Maryland. Tide Predicting Machine No. 2 is a special purpose mechanical analog computer for predicting the height and time of high and low tides. When the machine was routinely used, the operator would sit at the desk and turn the crank on the left, which powered the machine. Mechanical components, partially visible on the left, computed the height of tides. These were displayed on the paper tide curve visible at the top right and on the dial below the paper. 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 â€œOld Brass Brains,â€ 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 yearâ€™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. The National Oceanic and Atmospheric Administration (NOAA) occasionally displays the machine at its facility in Silver Spring, Maryland.

Arbroath harbour

A gloomy day at Arbroath harbour, Angus, Scotland.

The Grand Canyon.

1.The Grand Canyon ranges from 4 to 18 miles wide (6 - 28km) and is 277 miles long (445km) (that's river miles). 2.On average, it is 5000 feet deep (1,524m or over half a kilometre deep) 3.The entire Grand Canyon is essentially tilted: the northern rim is 1200 ft higher than the southern rim. 4.The climate within the canyon is semi-arid, and the floor in Summer can heat up to 106 degrees Fahrenheit (40 degrees Celsius). 5.It is the third largest canyon in the world (exceeded by Barranca de Cabre in Northern Mexico and Hell's Canyon in Idaho). 6.Around 88 species of mammals, 250 - 300 species of birds, 25 types of reptiles and five species of amphibians all live in the Grand Canyon. 7.The first white man to discover the Grand Canyon was GarcÃa LÃ³pez de CÃ¡rdenas in 1540. 8.Scientists suggest it took 3-6 million years to form. 9.It was carved with a single river, the Colorado, by the process of erosion. 10.800 million gallons of water flow through it per hour (that's 3028 million litres). 11.It is a "Natural Wonder of the World". 12.Its base is about 1/3 of the earth's age. 13.The floor of the Grand Canyon contains fossil footprints of over 20 species of reptiles and amphibians, yet no fossilised reptile bones or teeth have ever been uncovered. 14.Due to the absence of actual soil in the Canyon, very little plant life can grow on the floor, except for desert plants. 15.It is the site of the rare Brady Pin-cushion cactus, discovered in 1958. 16.The oldest human artifacts in the Grand Canyon are estimated to be 3000-4000 years old.

Blue mosque in Istanbul

Sultanahmet (Blue mosque) in Istanbul, Turkey. Sultanahmet (Blue mosque) in Istanbul, Turkey

Tide Predicting Machine No. 2 ("Old Brass Brains"&#x29

This photo shows the largest of the three sections of Tide Predicting Machine No. 2, a special purpose mechanical analog computer for predicting the height and time of high and low tides. The gears on the left transmit power from the hand crank. The components on the right contribute to the computation of the time of high and low tides. The U.S. government used Tide Predicting Machine No. 2 from 1910 to 1965 to produce its tide predictions. The machine, also known as â€œOld Brass Brains,â€ 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 yearâ€™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. The National Oceanic and Atmospheric Administration (NOAA) occasionally displays the machine at its facility in Silver Spring, Maryland. This photo shows the largest of the three sections of Tide Predicting Machine No. 2, a special purpose mechanical analog computer for predicting the height and time of high and low tides. The gears on the left transmit power from the hand crank. The components on the right contribute to the computation of the time of high and low tides. The U.S. government used Tide Predicting Machine No. 2 from 1910 to 1965 to produce its tide predictions. The machine, also known as â€œOld Brass Brains,â€ 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 yearâ€™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. The National Oceanic and Atmospheric Administration (NOAA) occasionally displays the machine at its facility in Silver Spring, Maryland.

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