HABT 



tips of hairs 



10 20 30 40 50 60 



Distance from skin (millimeters) 



40 

 30 

 20 

 10 

 - 

 --I0 

 20 







■30 

 ■40 



70 



Figure 5. Temperature gradient through fur of a sled dog thoroughly accli- 

 matized to the cold. R and S are rectal and subcutaneous temperatures. Each 

 point is the average of readings 10 to 20 minutes after insertion of gradiometer 

 from Griffin et al., 1953. 



210 



