Is a book hidden inside a decades-old piece of concrete? Scientists seek answers to art mystery

Kokkori and Gibbons look at elaborate equipment and Concrete Book being x-rayed
Maria Kokkori of the Art Institute of Chicago (at left) and Patti Gibbons of the University of Chicago Library (at right) teamed up with Argonne National Laboratory to scan Wolf Vostell’s Concrete Book (visible far right) using powerful X-rays at the Advanced Photon Source. (Photo by Jason Creps/Argonne National Laboratory)

High-powered X-rays to determine whether there is a book imbedded in artist Wolf Vostell’s concrete slab

When is a book not a book?

This seems like a simple question, but in the case of one curious piece of art, researchers have enlisted the resources of one of the world’s leading X-ray facilities at Argonne National Laboratory to answer it. What they find might end up rewriting a chapter of modern art history, and might shine new light on one of the pioneers of an artistic movement.

The piece in question is called Betonbuch, or Concrete Book, and is the work of German-born artist Wolf Vostell. He was part of Fluxus, an international community of experimental creators that flourished in the 1960s and 1970s, and was a pioneer of using concrete as a material for art, not just construction. In 1971, Vostell wrote a short book called Betonierungen, or Concretifications, and as evidence of his commitment to the material, he purportedly encased 100 copies of that book in numbered slabs of concrete.

Six years ago, as part of an exhibit on Vostell and Fluxus organized by art history professor Christine Mehring, the University of Chicago purchased Concrete Book #83, and it immediately intrigued Patti Gibbons. As the head of collection management at the University of Chicago’s Hanna Holborn Gray Special Collections Research Center, Gibbons works at the University’s Joseph Regenstein Library and is involved in curating displays of the institution’s collections.

“The mystery of what’s supposed to be inside of there intrigued me,” Gibbons said. “I always thought it would be a good idea to look.”

Gibbons teamed up with Maria Kokkori, associate scientist formerly at the Art Institute of Chicago and now at Northwestern University, to finally turn the page on this mystery. Kokkori uses Concrete Book in her classroom, teaching materials science as it relates to art. For her, Vostell’s work represents a turning point in the use of concrete to create art, instead of to construct buildings and bridges.

“Concrete is a material you would see in construction, but not in the art world in the ‘70s,” Kokkori said. “Construction and art are often considered different fields and disciplines, but Vostell was a pioneer of new technologies to use concrete as an artistic material.”

The pair first tried to peer inside the 20-pound, two-inch-thick chunk of concrete using ultrasound and  X-ray machines at the University of Chicago, but were only able to detect metal wires inside, not the book. The wires may hold the book between them, or may be there to provide reinforcement of the concrete.

They knew they’d need a more powerful X-ray beam to truly crack the case, so they turned to the Advanced Photon Source located at Argonne National Laboratory, a U.S. Department of Energy national laboratory that is affiliated with UChicago.

The Advanced Photon Source generates some of the brightest X-ray light in the world, at energies that allow it to penetrate thicker objects. At beamline 6-BM, they used a technique called X-ray diffraction to search for signs of paper and vellum inside the concrete.

“First we scanned a different copy of the book itself, the book that is meant to be inside the concrete,” said Argonne beamline scientist John Okasinski. “This gave us a signature to look for in the object itself. Although the sample is different, the techniques we are using are the same we would use for materials science experiments.”

Wolf Vostell's Concrete Book in an open box
Wolf Vostell was a pioneer of using concrete as a material for art, not just construction. In 1971, he wrote a short book called Concretifications, and as evidence of his commitment to the material, he purportedly encased 100 copies of that book in numbered slabs of concrete. The University of Chicago holds book #83. (Photo by Jason Creps/Argonne National Laboratory)

Kokkori said the results of the X-ray scans will be published in a journal. The pair presented details of the experiment as a work in progress at a recent Art Libraries Society of North America conference. Whatever the answers may be, Kokkori said, they would illuminate questions both artistic and scientific.

“How do we define a book?” she asked. “If Argonne scientists do find a booklet there, how do we contextualize this information? If they don’t, then the answer is equally important, because if provides more context and informs history. It will inform how we share this piece with the public.

“We have the artist’s testimonial, and no reason to doubt there is something there, but we still need scientific proof,” she said. “It’s an important message to students to question the reliability of sources. It’s a great intellectual exercise to question, and then to question the questions.”