538 



PHALEN, 



The irregular changes in the temperature are accounted for by the 

 presence of fleecy clouds which at times mitigated the effect of the sun- 



light. 



Experiment No. VI. — The last experiment was repeated, except that 

 hot water was used and the flasks allowed to remain in the shade. 



Table IX. 



Exposure. 

 i 



Water 

 temperature. 



White. 



Orange- 

 red. 





°C. 



75.0 

 71.0 

 68.5 

 65.2 

 63.0 

 59.0 

 57.5 



°C. 



75.0 

 72.0 

 70.0 

 67.0 

 65.0 

 61.0 

 59. 5 

















Experiment No. VII. — A composite shirt was made by sewing together 

 one-half of an orange-red garment and one-half of a white one. This 

 was put on a man and clinical thermometers, protected with corks to 

 keep them away from the surface of the body and the cloth, were sus- 

 pended, one under each side. After ten minutes' exposure to the sun 



the thermometer beneath the white side registered 3.1 



while that 



beneath the orange-red registered 43°C. 



The thermometers were then permitted to lie against the body, with the 

 shirt in contact with the instrument. Ten minutes' exposure resulted 

 in a record of 36° under the white and 37°. 25 under the orange-red. 

 During the experiment the subject perspired profusely. He reported 

 tin- perspiration first on that side covered by the orange-red, and the 

 moisture appeared through the cloth very much earlier on this side 

 than on the white. 



The experiments with the air and cold water temperatures were re- 

 peated except that in each case the materials used were covered with a 

 layer of khaki cloth. The same results were obtained, differing only in 

 degree, there being not so much difference between the temperatures 

 as when nothing intervened between the sun's rays and the undershirt 

 material. 



