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Start Over You searched for: Subjects Exhalation Remove constraint Subjects: Exhalation Subjects Air Pollutants Remove constraint Subjects: Air Pollutants Authors Mitchell, S. Weir (Silas Weir), 1829-1914, author Remove constraint Authors: Mitchell, S. Weir (Silas Weir), 1829-1914, author

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1. The composition of expired air and its effects upon animal life: abstract of a report on the results of an investigation made for the Smithsonian Institution under the provisions of the Hodgkins fund