----------------- HES POSTING ----------------- Regarding the machine which illustrates macroeconomic flows: A copy exists in the seminar room of the Economics department at the University of Alberta in Edmonton. According to people I asked there, it was built in the 1960s or 1970s for classroom purposes. Ross Emmett ------------ FOOTER TO HES POSTING ------------ For information, send the message "info HES" to [log in to unmask]