DR. DAVY ON THE TEMPERATURE OF MAN. 



323 



4. Of the Effect of Carriage Exercise on the Temperature. 

 The observations which follow, were made immediately after getting out of the 

 carriage, which was a close one, and its windows commonly closed ; and the dress 

 worn, at the time of being out, was warm. 



Feet and hands cool, almost cold, as was experienced in all the preceding instances. 

 These results are strongly contrasted with those given in the preceding section, 

 showing the exalting effect of active exercise on the temperature. I have other 

 results, equally proving how gentle exercise, in a cold atmosphere, has a depressing 

 effect, whether taken in a carriage, on horseback, or on foot, walking slowly. 



5. Of the Effect of Exposure to Cold Air without exercise. 



The few observations I have collected on this point, have been made the instant 

 after returning from an adjoining church, the temperature of which in the cold 

 weather of winter is little above the freezing-point, no attempt being made to warm 

 it, and the congregation which assembles in it at that season being small. 



In each of the above instances, in spite of warm clothing, the sensation experienced 

 by the observer was that of disagreeable chilliness, and in the feet and hands, of cold- 

 ness ; a feeling of drowsiness was also perceived, as if the condition induced were an 

 approach to the state of temperature of a hybernating animal, or to that which is 

 probably the prelude to the sleep in the human being resulting from long exposure 

 to severe cold without exercise. 



6. Of the Effect of Excited and Sustained Attention on the Temperature, 

 The state of mind referred to is that accompanied with exertion, such as i.s expe- 

 rienced in composition, or in reading a work of exciting interest. 



The observations which follow have been made entirely at night, after from two 

 to five hours of sustained attention. Many more were made by day ; but these are 

 not given, as they are not so well fitted for comparison. 



