The teaching of Hygiene in Spain during the 19th Century follows the classical paths, coming from Hippocrates and Galen. The tradition of the sex res non naturales is pursued along the main textbooks of Francisco de Paula and Jacinto Montells y Nadal, putting their ideas in comparison with some other books consulted or translated during the period. Nevertheless, there were some innovations, as the introduction of modern Chemistry, or modern Physiology.