Hi SIGCIS members, Thanks to the many members of the list for the suggestions about exhibition and calculating machines 17th - 19th c. We have some very well-read members! If I haven't gotten back to you yet, I will in the next day or so. If anyone would like a little bibliography of texts on the topic, I can send that to you in early May. Bernard Bernard Geoghegan Doctoral Candidate, Program in Screen Cultures, Northwestern University Institute Visitor, Program in Science, Technology and Society, Massachusetts Institute of Technology