Garfield Essay: Works of Art at ISI :  ISI's "World Brain" by Gabriel Liebermann:  The World's First Holographic Engraving"

"World Brain" by Gabriel Liebermann is now housed at Chemical Heritage Foundation 315 Chestnut Street Philadelphia, PA 19106 Phone: (215) 925-2222  Fax: (215) 925-1954 http://www.chemheritage.org/     Figure 1 - Close-up of  holographic engraving "World Brain" showing arc functions etched into the surface of the aluminum alloy plate Figures 2-3 - Two photos of "World Brain" show how the image changes with the viewer's perspective. Some lines and figures remain the same as the viewer  moves past the work.  Others appear to shift or completely disappear at different viewing angles. Figure 4 - "World Brain" as seen from yet another perspective.