Journal of the Association of Engineering Societies (1881)
Association of Engineering Societies (U.S.) · New York, [etc.] Board of Managers · leaf 77
een the rising and falling of these two lines. You see the observations extended over several months. I found that there was a difference in the amount of carbon dioxide in the air of the streets at different hours of the day. Rush hours in the subway always gave larger amounts of carbon dioxide… … Fig. 2. Hourly variations in the amount of carbon dioxide in the air of the subway. Averages of 1 244 analyses. A Member. — What caused that very great rise in December? Dr. Soper. — A large increase in the number of people using the subway and streets. There were more people than usual in the…
Engineering
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