Image:Clepsydra-Diagram-Fancy.jpeg

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[edit] Summary

Description

Diagram of a fancy clepsydra. Water enters and raises the figure, which points at the current hour for the day. Spillover water operates a series of gears that rotates a cylinder so that hour lengths are appropriate for today's date. The ancient Greeks and Romans had twelve hours from sunrise to sunset; since summer days are longer than winter days, summer hours were longer than winter hours.
Source

Abraham Rees (1819). “Clepsydra”, Cyclopædia: or, a New Universal Dictionary of Arts and Sciences. The image is the JPEG reproduction published 2007-02-01 by the Horological Foundation.
Date

1819
Author

The illustrator was probably John Farey, Jr. (1791–1851). The principal engraver for the encyclopedia was Wilson Lowry (1762–1824).[1]
Permission
(Reusing this image)

see below
Other versions Image:Clepsydra-Diagram-Fancy.png

[edit] Licensing

Public domain This image (or other media file) is in the public domain because its copyright has expired.

This applies to the United States, Canada, the European Union and those countries with a copyright term of life of the author plus 70 years.

Note that a few countries have copyright terms longer than 70 years: Mexico has 100 years, Colombia has 80 years, and Guatemala and Samoa have 75 years. This image may not be in the public domain in these countries, which moreover do not implement the rule of the shorter term. Côte d'Ivoire has a general copyright term of 99 years and Honduras has 75 years, but they do implement that rule of the shorter term.

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[edit] References

  1. ↑ Frances Robertson (2005-01). "The aesthetics of authenticity: printed banknotes as industrial currency". Technology and Culture 46 (1): 31-50.

File history

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Date/TimeDimensionsUserComment
current07:32, 30 April 2007375×600 (41 KB)Eubulides ({{Information |Description= |Source= |Date= |Author= }} )
05:06, 30 April 2007296×558 (27 KB)Eubulides ({{Information |Description=Diagram of a fancy clepsydra. Water enters and raises the figure, which points at the current hour for the day. Spillover water operates a series of gears that rotates a cylinder so that hour lengths are appropriate for today's )
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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 file.

Orientation Normal
Horizontal resolution 72 dpi
Vertical resolution 72 dpi
Software used Adobe Photoshop 7.0
File change date and time 19:02, 11 October 2004
Color space 65535