Excerpt from The Causes of Infectious DiseaseThe liberating impulses, as they are called in the inorganic sciences, are called stimuli in speaking of normal life-processes. Liebig, in treating of fermentation processes, first used the term excitation, so that we may speak of the stimuli that evoke disease as excitants of disease.About the PublisherForgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.comThis book is a reproduction of an important historical work. Forgotten Books uses state-of-the-art technology to digitally reconstruct the work, preserving the original format whilst repairing imperfections present in the aged copy. In rare cases, an imperfection in the original, such as a blemish or missing page, may be replicated in our edition. We do, however, repair the vast majority of imperfections successfully, any imperfections that remain are intentionally left to preserve the state of such historical works.