ACTION OF THE TROPICAL SUN. 



123 



Table VIII. — Characteristic records of experiments testing human skin tem- 

 perature radiated ty the sun. Figures, except pyrheliometer readings, in degrees 

 centigrade. 



[Ft. Filipino, upper half without clothes ten minutes in sun. Sunny side, 35°. 8 to 36°.3 ; 



shaded side, 32 M to 32°.4.] 



JANUARY 4, 1911. 



(Pyrheliometer reading 9.20 a. m., 680 ; 9.40 a. m., 720.) 



T. American, brown hair. 



Side 

 measured. 



Arm. 



Cheek. 



Forehead. 



Chest.' 







31. 4 to 31. 8 



31. to 31. 2 



31.0 to 32. 4 



32.9 







Air temperature in shade 24".7. 

 One side of face 10 to 15 min- 

 utes in sun, other sidein shade, 

 corresponding points. 



Sunny side _ 



35.8 



35.2 





41.8 





Shady side. 



31. 5 to 31. 9 



31. 3 to 31. 9 



31. 7 to 31. 9 





"Between shirt and undershirt. Air in hair after exposure 46°.0. 

 JANUARY 6, 1911. 



Ma. Filipino. 



Face. 



Forehead. 



Palm of 

 hand. 



Back of 

 hand. 



Chest. 



Muscular work in sun, se- 

 verely perspiring 



32. 4 to 32. 9 



33. 5 to 33. 7 



33. 3 to 33. 9 



32. 8 to 33. 1 



33. 9 to 34. 5 



JANUARY 3, 1911. 

 (Pyrheliometer reading 10 a. m., 845; 10.30 a. m., 865.) 



Ma. Fijipino. 



Face. 



Fore- 

 head. 



Arm. 



Tip of 

 nose. 



In hair. 



Chest. 



Air temperature in shade 28°.9 



31. 5 to 31. 9 



32.5 



32. 1 to 32. 5 



31.7 





32.5 



After 30 minutes in sun 



35.4 



34.9 



36.9 



34.1 



44.0 



39.8 





JANUARY 10, 1911. 

 (Pyrheliometer reading 9.30 a. m., 845; 9.40 a. m., 850.) 



Individual. 



Condition. 



Arm. 



Hand. 



Fore- 

 head. 



Cheek. 



In 

 hair. 



Axilla.' 



S. American, 

 fair hair. 



In shade 28° 



After 15 minutes in 

 sun, sweat in fine 

 droplets. 



32.8 

 35.6 



''30.7 

 35.6 



33.4 



34.8 



32.8 

 34.0 



35.2 

 44.1 



37.6 



F. Filipino, 

 brown skin, 

 black hair. 



After 15 minutes in 

 sun, same day, 

 directly after S. 



33. 4 to 34. 8 



34. 6 to 34. 8 



34.3 



33.9 



46.7 





' Between shirt and undershirt. 



'i Has wet hands. 



