In this classic work of mountaineering literature, Italian physiologist Angelo Mosso describes his scientific observations of the effects of high altitude on the human body during his ascents of various Alpine peaks in the late 19th century. Drawing on his own experiences as well as the accounts of other mountaineers, Mosso offers a fascinating glimpse into the physical and psychological challenges of high altitude climbing, and his groundbreaking research paved the way for future studies of the physiology of extreme environments.This work has been selected by scholars as being culturally important, and is part of the knowledge base of civilization as we know it.This work is in the "public domain in the United States of America, and possibly other nations. Within the United States, you may freely copy and distribute this work, as no entity (individual or corporate) has a copyright on the body of the work.Scholars believe, and we concur, that this work is important enough to be preserved, reproduced, and made generally available to the public. We appreciate your support of the preservation process, and thank you for being an important part of keeping this knowledge alive and relevant.