Erratum

D@rentiel(s)# and Cognition technical objects. He suggests that the audience listens to the body, sees inside the body, breaking the border between the inside and the outside, between the private and the public self, the skin no longer being the separation . In other words, he showsus an extended body (andmind). How to function in symbiosiswith technology is central to his artistic creation. Stelarc does not propose that human beings become robots, but that they are in the process of adaption to a technological environment,from a biosphere to a bio-silicone-sphere. For a first try, Differentiel(s)succeeded in its goals, proving that-even if they are sometimes difficult-true and seminal exchangescan occur between scientists and artists. Differentiel(s) (includingthe various parts of this For information about the proceedings of event),contact CYPRES, Ecole d’Art, 13100Aix-en-Provence, France. ANNICKBURbWD ASTN 57, rue FalguiGre F-75015Paris France Rue Emile Tavan, ERRATUM In Leonardo 26, No. 2 (1993),several illustrations by H.S.M. Coxeter and G.C. Shephardwere run in the Gatewaysection.The figure caption for Fig. 10was printed incorrectly. The corrected figure caption follows . W e regret any confusion this may have caused. sional polytope 421, whose facets consist of 2160 cross polytopes 411(analogousto the octahedron On) and 17280 simplexes420 (analogousto the tetrahedron 0 2 0 ) . Coxeter and Shephard,Fig. 10. The real eight-dimenPruesser ... the U.S. Army’s 84th Engineer Camouflage Battalion. He co-foundedthe Contemporary Arts Association in Houston, Texas, in 1948, and, when the first contemporary arts museumwas built in Houston, he became codirector. Cambridge by Gyorgy Kepes at MIT in 1954, Preusser worked as art editor of the Texas Cancer Bulletin, as stage set designer for Houston’s Texas Stage, as associatecurator of educationat the Houston Museumof FineArts and as an art instructor at the University of Houston. tions and inthe Archives of American Art at the Smithsonian Institution.RobertPreusserwas a p pointedas a Co-Editor of Leonardo in 1973. His articles in Leonardo in cluded“Relating Art to Science and Technology: An Educational Experiment at the Massachusetts Institute of Technology,’’ Leonardo Before being invitedto His work hangs in private collec6 , NO.3,199-206, 1973. ROGER F. MALINA Gateway 191 ...