File:Tide Predicting Machine No. 2.jpg

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DescriptionTide Predicting Machine No. 2.jpg	English: Part of the second 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	14 March 2016, 11:24:18
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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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. CC0falsefalse

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	Date/Time	Thumbnail	Dimensions	User	Comment
current	01:11, 1 May 2016		1,367 × 2,048 (756 KB)	Sf9000	User created page with UploadWizard

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Tide-Predicting Machine No. 2

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Author	30 21:02:03
Copyright holder	Steven Fine
Date and time of data generation	11:24, 14 March 2016
Latitude	38° 59′ 29.62″ N
Longitude	77° 1′ 46.07″ W
Altitude	100.827 meters above sea level
Short title	Tide Predicting Machine No. 2
Image title	Part of the second 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.
City shown	Silver Spring
Orientation	Normal
Horizontal resolution	0.29346002912116 dpi
Vertical resolution	49.5125 dpi
File change date and time	(Macintosh)
Exif version	2.3
Date and time of digitizing	11:24, 14 March 2016
DateTimeOriginal subseconds	8
DateTimeDigitized subseconds	8
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	17:02, 30 April 2016
Unique ID of original document	E56F21263406F0D1058B84711B76E568
Copyright status	Copyright status not set
Keywords	1910 2016 Administration Atmospheric CO-OPS Center Center for Operational Oceanographic Products and Services Coast MD Maryland NOAA National Oceanic and Atmospheric Administration Oceanic Oceanographic Operational Products Services Silver Silver Spring Spring States Tide predicting machine U.S. U.S. Coast and Geodetic Survey United United States analog analog computer antique brains brass chain computer gear geodetic high high tide historic history low low tide machine mechanical metal national ocean old old brass brains pulley summation summation chain survey tide tide predicting machine no. 2 weight
Province or state shown	Maryland
Country shown	United States
Sublocation of city shown	Downtown Silver Spring
Code for country shown	US
IIM version	4

File:Tide Predicting Machine No. 2.jpg

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14 March 2016

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38°59'29.622000001"N, 77°1'46.067999999"W

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