Excerpt from The Azoic System and Its Proposed Subdivisions Packard's Observations in 1865 he recognizes there, on very inadequate evidence, the Laurentian and Huronian, 381 labradorite rocks seen, apparently eruptive, but called by him N orian, 381 hind refers the rocks of Labrador to the Lau rentian on lithological grounds, 381 wilkins holds the same views, calling a dike Norian, 382. 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.

In what is widely considered the most influential book ever written by Walter Lippmann, the late journalist and social critic provides a fundamental treatise on the nature of human information and communication. The work is divided into eight parts, covering such varied issues as stereotypes, image making, and organized intelligence. The study begins with an analysis of "the world outside and the pictures in our heads", a leitmotif that starts with issues of censorship and privacy, speed, words, and clarity, and ends with a careful survey of the modern newspaper. Lippmann's conclusions are as meaningful in a world of television and computers as in the earlier period when newspapers were dominant. Public Opinion is of enduring significance for communications scholars, historians, sociologists, and political scientists. Copyright © Libri GmbH. All rights reserved.

The Encyclopedia of Caves and Karst Science contains 350 alphabetically arranged entries. The topics include cave and karst geoscience, cave archaeology and human use of caves, art in caves, hydrology and groundwater, cave and karst history, and conservation and management. The Encyclopedia is extensively illustrated with photographs, maps, diagrams, and tables, and has thematic content lists and a comprehensive index to facilitate searching and browsing.