4*6 DISEASES OF IRRITATION. SECT. XXXII. 3. 



bear the more temperate coldnefs of Buxton bath, 

 which is about eighty degrees of heat, and which 

 ftrengthens them, aud makes them by habit lefs lia- 

 ble to great quiefcence from fmall variations of 

 cold, and thence lefs liable to be difordered by the 

 unavoidable accidents of life. Hence it appears, 

 why people of thefe inirritable conftituticns, which 

 is another expreffion for fenforial deficiency, are 

 often much injufed by bathing in a cold fpring of 

 water ; and why they mould continue but a very 

 fhort time in baths, which are colder than their 

 bodies ; and flioul4 gradually increafe both trre de- 

 gree of coldnefs of the water, and the time of their 

 continuance in it, if they would obtain falutary ef- 

 fects from cold immerfions. See Se6t. XII. 2. i 



On the other hand, in all cafes where the heat 

 of the external furface of the body, or of the inter- 

 nal furface of the lungs, is greater than natural, 

 the ufe of expofure to cool air may be deduced. 

 In fever-fits attended with ftrength, that is with 

 great quantity of fenforial power, it removes the 

 additional ftimulus of heat from the furfaces above- 

 mentioned, and thus prevents their excefs of ufe. 

 lefs motion ; and in fever-fits attended with debi- 

 lity, that is with a deficiency of the quantity of 

 fenforial power, it prevents the great and dangerous 

 wafte of fenforial power expended in the unnecef- 

 fary increafe of the actions of the glands and capil- 

 laries of the (kin and iungs. 



4. In the fame manner, when any one is long 

 cxpofed to very cold air 3 a quiefcence is produced 

 of the cutaneous and pulmonary capillaries and ab- 

 forbents, owing to the deficiency of their ufual fti- 

 mulus of heat ; and this quiefcence of fo great a 

 quantity of veffels affects, by irritative aflbciation, 

 the whole abforbent and glandular fyflem, which 

 becomes in a greater or lefs degree quiefcent, and 

 a cold fit of fever is produced, 



If 



