Excerpt from The Wilderness and Its Tenants, Vol. 3 of 3: A Series of Geographical and Other Essays, Illustrative of Life in a Wild Country Together With Experiences and Observations, Culled From the Great Book of Nature in Many Lands Unfortunately our knowledge of these great deeps is necessarily Of the slightest. The great expense and difficulty in carrying out scientific investigations in water, at these enormous depths, have hitherto proved an insuperable bar to anything being attempted in this respect, except by a few regularly organized scientific expeditions, specially fitted out for this purpose by the principal naval powers. 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.