File:VitruviusTenBooksMHMorgan1914p295.gif

Vitruvius: The Ten Books on Architecture. Vitruvius. Morris Hicky Morgan. Cambridge: Harvard University Press. London: Humphrey Milford. Oxford University Press. 1914. The image is on page 295. The copyright is expired.

This image is to be found in several places on the web and in books:

ISBN: 0415061377 Greek and Roman Technology: A Sourcebook by John W Humphrey p. 316 Section 8.30 Fig. 17 Design for a Vitruvian Water-Screw. Note that on page xiii permissions are recorded for several copyrighted images but not for this one.

The image appears with no source cited at http://www.math.nyu.edu/~crorres/Archimedes/Screw/VitScrew.gif http://www.math.nyu.edu/~crorres/Archimedes/Screw/SourcesScrew.html#vitruvius captioned "Construction of the water screw"

It also appears at http://www.redstoneprojects.com/trebuchetstore/archimidesescrewcutaway.gif http://www.redstoneprojects.com/trebuchetstore/archimedesscrew.html beside the Morgan translation of the Vitruvius passage.

Those two .gif images are not identical, but overlay perfectly when aligned. They differ in the way the transparent pixels were selected. This suggests they were not independently scanned.

The image also appears at http://www.palmers.ac.uk/internet/Previous%20Events/Eric%20Excellence%20day/webs2003/PYTHON%20WEBSITE/VitScrew.gif http://www.palmers.ac.uk/internet/Previous%20Events/Eric%20Excellence%20day/webs2003/PYTHON%20WEBSITE/Arcscrew.htm

The actual ancient latin text states that there is an illustration at the end of the manuscript.

ISBN: 1417969571 Vitruvius: The Ten Books on Architecture translated by Morris H. Morgan Copyright 1914 Harvard University Press; the copyright is expired.

Vitruvius: The Ten Books on Architecture. Vitruvius. Morris Hicky Morgan. Cambridge: Harvard University Press. London: Humphrey Milford. Oxford University Press. 1914.

The image is on page 295.

The Perseus project has the text and two images:

http://www.perseus.tufts.edu/cgi-bin/ptext?lookup=Vitr.+10.6.1 http://www.perseus.tufts.edu/cgi-bin/image?lookup=Perseus:image:2000.23.0061&image=1

http://www.perseus.tufts.edu/cgi-bin/image?lookup=2000.23.0061

http://www.perseus.tufts.edu/cgi-bin/image?lookup=2000.23.0062

http://www.perseus.tufts.edu/cgi-bin/image?lookup=Perseus:image:2000.23.0062&image=1

From http://www.perseus.tufts.edu/Help/faq.html

'I would like a copy of one of the images I've seen in Perseus, how do I get one?'

The credit notices for all images appear at the top of each image page. If this notice reads "...courtesy of X museum," you must contact the named museum for permission to reproduce their image. Addresses for museums are at the bottom of our copyright page.

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In the case of these images, it is clear that there are no copyright holders, since the images were published in 1914.

From http://www.perseus.tufts.edu/copyright.html

The materials on the Perseus Project Web pages (including all texts, translations, images, descriptions, drawings etc.) are provided for the personal use of students, scholars, and the public. Any commercial use or publication of them without authorization is strictly prohibited. All materials are copyrighted and are not in the public domain. Copying of materials on the Perseus Web pages is not permitted.

Clearly, this statement is overly broad. Some of the materials are in the public domain. A compilation copyright does not entitle the holder to prohibit copying of text not subject to copyright.

	这个媒体文件在美国属于公有领域。这适用于版权过期的美国作品，通常因为其首次出版于1929年1月1日之前，或即便当天或以后出版，其并未包含版权通告或获得版权回溯。查看这个页面可以获取到更多的解释。
	这个图片在美国以外可能尚未处于公有领域；尤其在对美国作品不适用较短期限法则的国家和地区，如加拿大、中国大陆（不含香港及澳门）、德国、墨西哥和瑞士。创作者和发表年份是关键信息，因此必须提供。参见维基百科:公有领域及维基百科:版权信息以获取更多细节。