Excerpt from Surgery, Its Principles and Practice, Vol. 2: With 572 Text-Illustration and 9 Colored Plates The lesions of bones may be divide'd practically into four classes Those lesions produced by various pathogenic organisms, including those pyogenic organisms which ordinarily cause acute suppuration, and' the organisms of tuberculosis, actinomycosis, and syphilis. 2. Those le sions which are apparently due to some diathesis, and which affect prao tically all or many of the bones of the skeleton; the actual cause of most diathetic diseases is absolutely unknown. They include osteogenesis imperfecta, chondrodystrophia foetalis, osteitis deformans, rickets, osteo malacia, and acromegaly. 3. Changes in the bone produced by disuse atrophy. 4. Tumors of bone. 5. Cysts, which mav be primary or may be due to the presence of echinococci. 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.