Download or read book A Manual of Practical Hygiene, Vol. 1 (Classic Reprint) written by Edmund A. Parkes and published by Forgotten Books. This book was released on 2016-09-29 with total page 418 pages. Available in PDF, EPUB and Kindle. Book excerpt: Excerpt from A Manual of Practical Hygiene, Vol. 1 Natural ventilation Artificial ventilation Extraction Propulsion section iv.-relative value of natural and artificial ventilation chapter IV. 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.