All, I just received a note via a long chain that ended with Mary Croarken about a new web page by Denis Roegel that presents a very complete analysis of most of the major mathematical table projects prior to the 20th century, including both Vlacq and Prony. While the subject predates the interests of many on this list, it remains an important part of computing history and deserves to be better known. The link is http://www.loria.fr/~roegel/locomat.html David ---------------------------------------- David Alan Grier FIrst Vice President IEEE Computer Society 2011 Vice President of Publications, Associate Professor of International Science and Technology Policy Center for International Science and Technology Policy Elliott School Of International Affairs George Washington University grier@computer.org "The Known World" IEEE Computer www.computer.org/theknownworld