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Archiu:Clepsydra-Diagram-Fancy.jpeg

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Clepsydra-Diagram-Fancy.jpeg ((375 × 600 pixels, tamany de l'archiu: 57 kB, MIME tipo: image/jpeg))

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Summary

Description 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.
Date
Source Abraham Rees (1819) "Clepsydra" in Cyclopædia: or, a New Universal Dictionary of Arts and Sciences The image is the JPEG reproduction published 2007-02-01 by the Horological Foundation.
Author The illustrator was probably w:John Farey, Jr. (1791–1851). The principal engraver for the encyclopedia was Wilson Lowry (1762–1824).[1]
Other versions Image:Clepsydra-Diagram-Fancy.png

Licensing

Public domain

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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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depicts English

inception English

1819

media type English

image/jpeg

checksum English

3a822fc2f56b95bf3aa3ff3176aa8896eb89167f

determination method or standard English: SHA-1

data size English

58,261 byte

height English

600 pixel

width English

375 pixel

Historial de l'image

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Data/HoraMiniaturaDimensionsUsuariDescripció
actual18:55 8 gin 2014Miniatura de la versió de 18:55 8 gin 2014375 × 600 (57 kB)wikimediacommons>HohumCleanup

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