Excerpt from A Treatise on the Common Sole (Solea Vulgaris), Considered Both as an Organism and as a CommodityThe distinction between theory and practice is one that is generally recognised in all departments of human affairs. By theory in this context is meant pure knowledge the knowledge of things as they are apart from any use which may be made of the knowledge. This kind of knowledge - the result of the most careful investigation, continually corrected by improved experiments and more widely extended observation, and subjected to the most rigid criticism by successive generations of enquirers - is pure science. Practice, on the other hand, or practical knowledge, is the knowledge of the methods'by which the material and the forces of nature can be made to satisfy human needs and desires. Practice necessarily depends on some knowledge of the properties and relations of natural objects and forces, though in many cases it may simply consist in knowing that a certain desired result will generally be produced by particular operations. This is the kind of knowledge possessed by men trained and experienced in particular trades or crafts.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.