PREFACE. THIS is a practical treatise showing the prevailing errors in the ventilation of churches, halls, schools, and other public buildings, and pointing out how the faults can be remedied. The information bearing upon the effects of wind action, and the intermittent air currents in public buildings, was obtained by experiments, or elucidated in the course of the author's practical experience, and these, together with the studies in the physics of ventilation set forth, cannot fail to be of value to architects and builders, as well as to the managers and caretakers of public buildings. The author has endeavoured to 'compress much practical matter into the smallest compass, and the scientific and technical information regarding the composition of the atmosphere, its impurities, etc., has been omitted because it can be obtained in any book on physics. Portions of the treatise have been compiled especially to enable caretakers to make the best use of the ventilating appliances which they have to control, and as there is no book on the subject, and great need for such information, it is hoped the matter provided will prove useful and instructive. The illustrations are not intended to be complete drawings of the buildings in question, but are only given to show the air currents and other information in refer ence to the air supply. LONDON, 1903. LIST OF ILLUSTRATIONS. FIGURE 1. Waves formed by the Air falling from a high Dome 2. Waves in Air moving horizontally 3. Air Movements in Theatres, etc. 4. Open Tube Ventilator with Mouth cut slantwise 5. Open Tube Ventilator with Mouth cut level 6. Plan of Streets with Houses, Churches C, C1, C2, C3, and Science School 7. Plan of a Town Hall 8. Plan of a Board School 9. Plan of a Hospital 10. Window Ventilator 11. Window Sash Ventilation PAGE 19 19 20 26 26 333 31 12. Section of a Church. 13. Section of a Church 14. Plan and Section of a Public Hall 15. Plan and Section of a Chapel 16. Plan and Section of a Church 20. Plan and Section of a Chapel or Hall 23. Hall with Valve of Ventilator near the Ceiling 24. Window with Ventilator opening outwards 25. Window with Sashes opening outwards . |