Excerpt from Hand-Book of Shading and Advanced Perspective Drawing, Vol. 4: Kr si's Drawing Series The second aim of a general Education is the acquisi tion of useful knowledge. Apart from its effect in devel oping the intellectual faculties, knowledge is necessary for the preservation and maintenance of life, and for the accomplishment of those purposes in which all human beings have an equal interest. 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.