Excerpt from Evolution: Social and Organic A second thought will show that they may do neither. There is a type of brain the specimens of which are very numerous, which seems to possess the faculty of keeping differ ent kinds of knowledge and contradictory ideas, in separate, water-tight compartments; Thus, as these ideas never come together there is no collision. About the Publisher Forgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.com This 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.