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Ventilation curiousities illustrate mine air flow
Prof John F Woodhull shows two lamp chimneys and a candle to demonstrate how heat drives air through one shaft and draws fresh air through another. The principle explains mine ventilation and odor removal, likening it to a jail furnace clearing sewer gas and a storm’s warming air rising to form rain.
MENTIONED IN THIS ARTICLE
John F. Woodhull
New York Teachers’ College
New Castle
Del
Theodore Waters
Chicago
Outer Ocean
Gilpin