NO. 2T) 



INFLUENCE OF ATMOSPHERE OX HEALTH 



57 



The air contained 2.58 per cent CO a at the end of the experiment. 

 All testified to ereat benefit derived from the fans. 



June 17, igio. Seven students and R. A. R. in chamber. 



The air taken at 11.34 a. m. gave C0 2 4 per cent, O., 15.63 per 

 cent; and that taken at 11.49 a - m - gave CO L , 5.26 per cent, O., 15. 1 

 per cent. The surface temperature of a student standing under the 

 big fan was raised from 32 C. at 11.7 a. m. to 33 C. at 11.34 a. m. 

 and was lowered by the fans to 32. 5 C. at 11.38 a. m., finally reach- 

 ing 34 C. at 11.49 a - m -j when the fans were off. The surface 

 temperature of another student rose from 32. 7 C. at 11.7 a. m. to 

 34. 5° C. at 11.49 a - m - He was not standing directly under the fans. 



Great relief was given by the fans, and the students were quite 

 unaware of any chemical alteration in the atmosphere. The air of 

 the chamber at the end of the experiment did not smell, but felt 

 warm and moist. 



June so, iqio. Seven students and R. A. R. in the chamber. 



The air contained 5.05 per cent C0 2 at 2.50 p. m. and 5.24 per 

 cent at 3.5 p. m. The figures show how the pulse was accelerated. 

 Readings were taken at 2.30 p. m. and again when the fans were off, 

 at 2.50 p.m. 



