Ficheiro:Clepsydra-Diagram-Fancy.jpeg

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Resumo

Descrición Diagram of a fancy clepsydra, this type being an automaton or self-adjusting machine. 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.
Data
Orixe Abraham Rees (1819) "Clepsydra" em Cyclopædia: or, a New Universal Dictionary of Arts and Sciences The image is the JPEG reproduction published 2007-02-01 by the Horological Foundation.
Autoría The illustrator was probably w:John Farey, Jr. (1791–1851). The principal engraver for the encyclopedia was Wilson Lowry (1762–1824).[1]
Outras versións Image:Clepsydra-Diagram-Fancy.png

Licenza

Public domain

Este material está no dominio público nos demais países onde os dereitos de autor se estenden por 70 anos (ou menos) trala morte do autor.


Debe incluír tamén unha etiqueta de dominio público dos Estados Unidos para indicar por que esta obra se atopa no dominio público nos Estados Unidos. Note that a few countries have copyright terms longer than 70 years: Mexico has 100 years, Jamaica has 95 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. Honduras has a general copyright term of 75 years, but it does implement the rule of the shorter term. Copyright may extend on works created by French who died for France in World War II (more information), Russians who served in the Eastern Front of World War II (known as the Great Patriotic War in Russia) and posthumously rehabilitated victims of Soviet repressions (more information).

References

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

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Data/HoraMiniaturaDimensiónsUsuarioComentario
actual8 de xaneiro de 2014 ás 18:55Miniatura da versión ás 18:55 do 8 de xaneiro de 2014375 × 600 (57 kB)HohumCleanup
30 de abril de 2007 ás 07:32Miniatura da versión ás 07:32 do 30 de abril de 2007375 × 600 (41 kB)Eubulides{{Information |Description= |Source= |Date= |Author= }}
30 de abril de 2007 ás 05:06Miniatura da versión ás 05:06 do 30 de abril de 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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