Excerpt from Year-Book of Medicine, Surgery, and Their Allied Sciences, for 1864 The part which the walls of the vessels take in the production of new formations is a very extended one. The nuclei of the vessels, especially of the capillaries, form an important source of new elements in them all, inasmuch as they first enlarge, and then, by repeated division, procreate a breed of fresh nuclei. These latter surround themselves with proto lasma and with a membrane, and assume various forms and sizes, acco ing to the character of the new formation. This process may be traced in all inflamed tissues, most readily in bones, where the capillary nuclei increase, so that the capillaries are entirely covered with spindle formed nuclei, and become like granulation-vessels. If these nuclei go on merely to the formation of connective tissue there arise spongy graun lnticua, which, in certain non-suppurative joint affections, grow out from the bones, and by their tension cause great pain. If these nuclei in part turn to pus there is the common form of purulent caries. The case is similar in inflammation of other parts. This production of nuclei is sometimes an abundant in the brain and spinal cord as to simulate sarcoma. It is a great element in the formation of tubercle. The small granules of tubercular meningitis arise from the growth of the nuclei of the small vessels, as also do the tubercles of mucous and serous mem branes and of joints. In the lungs and kidneys the nuclei of the con nective tissue and the epithelium also contribute to the formation of tubercle. The characteristic forms of many tumours, alike benign and malignant, is due to their origin from the nuclei of the vessels. 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.