From makers to users : microscopes, markets and scientific practices in the seventeenth and eighteenth centuries : proceedings of the International workshop on the history of microscopy = Dagli artigiani ai naturalisti : microscopi, offerta dei mercati e pratiche scientifiche nei secoli XVII e XVIII : atti del Convegno internazionale di storia della microscopia : Milan, October 13-14, 2004 / edited by Dario Generali and Marc J. Ratcliff