Excerpt from Physical and Commercial Geography: A Study of Certain Controlling Conditions of Commerce The triple authorship, corresponding practically to the three Parts of this book, expresses graphically our belief that the facts and princi ples involved in a study of the environmental relations of man require contributions from both the natural and the social sciences, and are best presented by a combination of workers from these two fields. Therefore while each author is directly responsible for the presenta tion of material from his particular field, the outline and general character of treatment is the joint work of the three authors. General editorial supervision has been exercised by the author of Part II. 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.