The trial starts May 4 and continues to June 3 to coincide with the petition and consortium proposal to fund a subscription to ARTstor (please ask your librarian for more information).
What is ARTstor? According to their website "ARTstor is a digital library of more than one million images in the areas of art, architecture, the humanities, and social sciences with a set of tools to view, present, and manage images for research and pedagogical purposes".
"The ARTstor Digital Library is used by educators, scholars, and students at a variety of institutions including universities, colleges, museums, public libraries, and K-12 schools. The Digital Library serves users both within the arts and in disciplines outside the arts", such as anthropology, and the history of medicine and natural science.
Access is available on campus at http://www.artstor.org
Access is available off campus with Raven login at http://ezproxy.lib.cam.ac.uk:2048/login?url=http://www.artstor.org
Please note it is recommended you clear your cache (even 2 or 3 times) if you accessed ArtSTOR in the 2010 trial. ArtSTOR has gone through several new "builds" of its Digital Library since that trial and clearing your cache is advised by ArtSTOR for smooth access in this 2011 trial.
Note that ARTstor works best with Internet Explorer 7.0+, Firefox 3.0+, and Safari 3.0+.