Excerpt from An Introduction to Theoretical and Applied Colloid Chemistry, the World of Neglected Dimensions It hardly needs to be emphasized that upon such a tour the lecturer learns quite as much as his audience. The necessity Of having his material so. Easily in hand that he may vary it according to the type and special wishes Of his audience, or according to the time at his disposal, or to suit the viewpoint from which it is expected that his subject shall be handled - these things are Of the greatest value to the lecturer himself. There is Obviously much difference between the half-popular dissertation on colloid chemistry which is given twelve or thirteen hundred freshmen fore gathered in a building ordinarily used for religious exercises and the talk which is given so select an audience as the American National Academy and the American Chemical Society meeting in the spacious halls Of the Cosmos Club. And the theme Of colloid chemistry is itself made to wear a different face, depending upon whether one talks the week through in Pittsburgh to workers interested chiefly in technical problems or whether one tries in two hours in the Johns Hopkins Medical School in Baltimore to discuss the relationships Of colloid chemistry to biology and medicine. 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.