Excerpt from A Memoir on the History and Physical Geography of Minnesota Volney appears to have been the first observer to notice the prevalence of a valley current, from the tropical lati tudes up the Mississippi - a remark in which he is sustained, at later dates, by Dr drake and Dr. Hildreth. It is evident, from the scanty materials we possess, that this gulf current does not Spend its force until it has well nigh reached the southern terminus of the Itasca summit. It is certain that the extreme upper Mississippi escapes those icy winds from Hudson's and Batfin's bays, which are often felt, during the Spring months, in northern Michigan and north ern Wisconsin. The same latitudes which cross the lake country, give a milder climate in the valley of the upper Mississippi. One of the causes of this phenomenon has probably been noticed above. Others will doubtless be found by a scientific scrutiny of its meteorology. Mr. Epsy will enlighten us. 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.