The history of medicine may be looked upon as an important element of the history of the times and the ideas of any given age and place. To a surprising degree this is true of the history of many professions. While one would hardly suppose that hydraulics as such had very much to do with medicine, this is far from being an accurate view. There are numerous connections. The importance of hydraulics to physiology, particularly the physiology of the circulation, is revealed again and again to anyone who reads this fascinating history of hydraulics by Rouse and Ince. If one happens to believe that history is useful today, showing us that our problems are not unique and how other peoples and other times have faced theirs and tried to settle them, this book will have interest. History necessarily looks largely at the recent past and dimly at the distant past.