Excerpt from Modern Concepts of Clay MaterialsClay materials are composed essentially of minute crystalline particles of any one or more members Of a few groups of minerals known as the clay minerals. Using this clay-mineral concept as a point Of departure, researches starting from the many fields in which clay materials are important - from agriculture, engineering, geology, and the ceramic, rubber, paper, petroleum, and many other industries - have in the last fifteen years made outstanding progress toward a more satisfactory and complete understand ing of the precise composition of clay materials, their structure, and the factors that determine their properties.About the PublisherForgotten Books publishes hundreds of thousands of rare and classic books. Find more at www.forgottenbooks.comThis 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.