Excerpt from A Treatise of the Materia Medica and Therapeutics: Two Volumes in One When we fix our attention upon a diversity of mixed objects, we naturally, andalmost unconscious ly, begin our inquiries by separating them into groups or families, according to their various analo gies or resemblances. We thus obtain a general viewof their common and partial relations; and are thereby better enabled to investigate their individual characters, as well as to retain what We have learned concerning them, by the influence of association. 'we become systematic from the very constitution of the human mind. To classify our ideas is the first step we take towards useful knowledge; and the highest attainments of intellect are but a more ex tensive and intimate view of' the various relations which subsist between the objects of human know ledge. 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.