Excerpt from Modern Seismology The literature of the Subject is very extensive, but until comparatively recent years it contains much that is speculative, much that is inaccurate, and much that is false, as is ever the case with a science until it becomes quantitative. One recalls Lord Kelvin's first criterion of knowledge of a phenomenon, viz., How much of it is there? If the newest literature is not entirely free from speculation and inaccuracy, the study now proceeds on a quantitative basis which enables the reader to judge for himself as to the value Of the conclusions. The new Seismology as a quantitative physical science may be said to have started about thirty years ago, and with a small band of British scientists in Japan. These pioneers were Milne, Gray, Ewing, Perry and Knott. Germany and Italy may also claim pioneers about the same time. 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.