More than 850 individuals partly forgotten by name, but sometimes found in historical writings, together with many well known or recently deceased persons are presented in terms of bio-data, short career highlights, and main advances made to the profession with a short biography of the main writings. If available, a portrait is also included. Hydraulicians in Europe, Volume 2 is a continuation of the first volume, both in outline and in coverage and pagination. Volumes 1 and 2 include more than 1500 biographies.