Excerpt from New System of Ventilation, Which Has Been Thoroughly Tested Under the Patronage of Many Distinguished Persons: Being Adapted to Parlors, Dining, and Sleeping Rooms, Kitchens, Basements, Cellars, Vaults, Water-Closets, Stables, Preserving-Rooms, Churches, Legislative-Halls, Schools and Court-Rooms, Prisons, Hospitals, Stores, Show-Windows, Hotels, Banking-House, Re Dr. Johnson, or some other old English author - no matter about the name - has said that it is more difficult to write a preface to a book than the book itself, or words to that effect. That may be true when the author has nothing to say, and in such case it would be better to have no pref ace at all. Respecting the present book, we have had two editions without a preface, and would have no preface in the third edition, but that this particular page, apart from the copyright, would otherwise be left blank. Nature, it is said, abhors a vacuum, and we equally abhor unoccupied Space in a book. A Single octavo page may yet prove sufficient to electrify or convulse the world. With pen in hand, therefore, we will merely say that we have added much new matter to the present edition, which we hope may be read and studied with benefit and if we are instrumental in per suading people that they can not enjoy good health without. 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.