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File:DSCN1739-thomson-tide-machine.jpg

Description Tide predicting machine, by Sir William Thomson in 1876.

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.

Location: Science Museum, London.
Date upload on 20:53, February 19, 2005
Source en:Image:DSCN1739-thomson-tide-machine.jpg
Author William M. Connolley
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See also:

Kelvin's harmonic analyser
The following pages on Schools Wikipedia link to this image (list may be incomplete):

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 file.
Camera manufacturer NIKON
Camera model E950
Exposure time 1/5 sec (0.2)
F-number f/2.9
ISO speed rating 80
Date and time of data generation 14:47, 18 February 2005
Lens focal length 10.2 mm
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 Co-sited
Exposure Program Normal program
Exif version 2.1
Date and time of digitizing 14:47, 18 February 2005
Image compression mode 2
Exposure bias 0
Maximum land aperture 2.6 APEX (f/2.46)
Metering mode Pattern
Light source Unknown
Flash Flash did not fire
Colour space sRGB
White balance Auto white balance

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