Image:DSCN1739-thomson-tide-machine.jpg

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Description

Tide predicting machine, by Sir William Thomson in 1876. Location: Science Museum, London. Photo: William M. Connolley, 2005/02.

The accompanying plaque says: this, the first full sized machine for predicting tides, combined ten tidal components (one pulley for each componenet). It could trace the heights of the tides for one year in about four hours.

See-also http://www.bartleby.com/30/16.html, esp. figure 132.
Source

en:Image:DSCN1739-thomson-tide-machine.jpg
Date

upload on 20:53, February 19, 2005
Author

William M. Connolley
Permission
GNU head William M. Connolley on the English Wikipedia project has granted permission to copy, distribute and/or modify this document under the terms of the GNU Free Documentation License, Version 1.2 or any later version published by the Free Software Foundation; with no Invariant Sections, no Front-Cover Texts, and no Back-Cover Texts. A copy of the license is included in the section entitled " GNU Free Documentation License."
Subject to disclaimers.

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Metadata

This file contains additional information, probably added from the digital camera or scanner used to create or digitize it. If the file has been modified from its original state, some details may not fully reflect the modified image.

Camera manufacturer NIKON
Camera model E950
Horizontal resolution 300 dpi
Vertical resolution 300 dpi
Software used v981p-79
File change date and time 14:47, 18 February 2005
Y and C positioning 2
Exposure time 1/5 sec (0.2)
F-number f/2.9
Exposure Program Normal program
ISO speed rating 80
Exif version 2.1
Date and time of data generation 14:47, 18 February 2005
Date and time of digitizing 14:47, 18 February 2005
Image compression mode 2
Exposure bias 0
Maximum land aperture 2.6
Metering mode Pattern
Light source Unknown
Flash 0
Lens focal length 10.2 mm
Colour space sRGB
White Balance Auto white balance
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