Tib Arabi, or Arabian medicine was based upon medicine practiced by the Greeks, like Galen. Before the European Enlightenment, medicine or treatment of illness relied upon superstition, religion and folk lore. The practices described here are from what Edward Browne learnd when he lived in Persia as well as Constantinople after having studied Arabic and Persian at Cambridge University. This book is the content of lectures Browne delivered at the College of Physicians in Cambridge, England in November 1919 and 1920