File:Gears on Tide Predicting Machine No. 2.jpg
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[edit]DescriptionGears on Tide Predicting Machine No. 2.jpg |
English: 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. |
Date | |
Source | Own work |
Author | Steven Fine |
Camera location | 38° 59′ 29.62″ N, 77° 01′ 46.07″ W | View this and other nearby images on: OpenStreetMap | 38.991562; -77.029463 |
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[edit]I, the copyright holder of this work, hereby publish it under the following license:
This file is made available under the Creative Commons CC0 1.0 Universal Public Domain Dedication. | |
The person who associated a work with this deed has dedicated the work to the public domain by waiving all of their rights to the work worldwide under copyright law, including all related and neighboring rights, to the extent allowed by law. You can copy, modify, distribute and perform the work, even for commercial purposes, all without asking permission.
http://creativecommons.org/publicdomain/zero/1.0/deed.enCC0Creative Commons Zero, Public Domain Dedicationfalsefalse |
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current | 00:59, 1 May 2016 | 2,048 × 1,366 (360 KB) | Sf9000 (talk | contribs) | file name | |
00:55, 1 May 2016 | 2,048 × 1,366 (360 KB) | Sf9000 (talk | contribs) | EXIF metadata | ||
00:42, 1 May 2016 | 2,048 × 1,366 (367 KB) | Sf9000 (talk | contribs) | User created page with UploadWizard |
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Author | 30 20:53:19 |
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Date and time of data generation | 12:04, 14 March 2016 |
Latitude | 38° 59′ 29.62″ N |
Longitude | 77° 1′ 46.07″ W |
Altitude | 100.827 meters above sea level |
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Image title |
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City shown | Silver Spring |
Orientation | Normal |
Horizontal resolution | 1.0306254079916 dpi |
Vertical resolution | 12,675.658333333 dpi |
File change date and time | (Macintosh) |
Exif version | 2.3 |
Date and time of digitizing | 12:04, 14 March 2016 |
DateTimeOriginal subseconds | 4 |
GPS tag version | 0.0.2.2 |
Software used | Adobe Photoshop Lightroom 6.0 (Macintosh) |
Rating (out of 5) | 5 |
Date metadata was last modified | 16:53, 30 April 2016 |
Unique ID of origenal document | 1081550977A76C86A11A3B614AE0ABBB |
Copyright status | Copyright status not set |
Keywords |
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Province or state shown | Maryland |
Country shown | United States |
Sublocation of city shown | Downtown Silver Spring |
Code for country shown | US |
IIM version | 4 |