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SMITHSONIAN MISCELLANEOUS COLLECTIONS 



VOL. 60 



acknowledged the great benefit derived from the fans, particularly 

 those placed beneath the big fan. One student breathed the air from 

 outside the chamber through a tube and felt little relief. 



L. H., standing outside, breathed the air in the chamber through 

 a tube, and felt no discomfort ; the only result therefrom was a 

 deepening of the respiration. After the students had left the 

 chamber, L. H. entered it ; the air was warm and moist but there 

 was no offensive smell, or any sense of closeness when the fans were 

 put on. The air then felt like a pleasant summer breeze. 



June 3, 1010. Seven students and R. A. R. entered the chamber. 



The surface skin temperature of a student standing close under 

 the biggest fan rose from 31. 6° at 11.29 a - m - to 34° C. at 11.42 a. m. 

 and fell to 31. 5 C. on putting on the fans. A sample of air taken 

 at 11.40 a. m. gave CO, 2.2 per cent, 2 17.54 per cent ; and another 

 taken at 11.55 a - m - gave C0 2 3.61 per cent, 2 16.4 per cent. 



June jo, 10 10. Eight students and R. A. R. in chamber. 



The surface temperature of two of the students was slightly 

 lowered, 0.5 to i.o° C, when the fans were on; they were not 

 standing directly under the big fan. 



