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Excerpt from Natural and Artificial Methods of Ventilation: "A People's Health's a Nation's Wealth" Franklin The action of natural and of mechanical methods of ventilation is described and illustrated by diagrams, and an exposition given of the opinions held by the accepted authorities on the subject, with excerpts from the published accounts of their personal experience of the different systems. Extracts are also given from the' official reports of Commissions on ventilation, appointed by the British, French, and American Governments, in which the evils of forced downdraught ventilation and of hot-air heating are described, and the dangers of open-window ventilation in cold weather. The evidence submitted in the following pages in favour of or against the respective systems emanates from well-known Scientists and Sanitarians whose names are a sufficient guarantee of the value of the statements they make and of the opinions they express. Theories are not dealt with, the results of practical work only being recorded. 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.