ADYNAMIA. 383 



>owerful tonic with respect to the stomach : And this explains 

 hy, for that purpose, no exercises within doors, or in close car- 

 iages, are so useful as those in the open air. 



MCCXIX. From the same reasoning, we can perceive, that 

 he application of cold water, or cold bathing, while it is a tonic 

 ith respect to the system in general, and especially as exciting 

 he action of the extreme vessels, must in both respects be a 

 >owerful means of strengthening the tone of the stomach. 



That it excites the action of the vessels on the surface of the 

 )ody, is well known from the warmth which immediately suc- 

 ceeds its operation, where it acts properly ; and when it does 

 eave a chilliness and cold, it does not answer the purpose. 

 There is another curious fact, that cold bathing renders per- 

 sons less susceptible to the effects of cold, which is only to be 

 understood by its having considerable power in supporting the 

 vigour and action of the extreme vessels. We resist cold in 

 >roportion to the vigour of the system." 



MCCXX. These are the remedies to be employed towards a 

 radical cure of idiopathic dyspepsia ; and it might be, perhaps, 

 ixpected here, that I should treat also of the various cases of the 

 ympathic disease. But it will be obvious, that this cannot be 

 >roperly done without treating of all the diseases of which the 

 lyspepsia is a symptom, which cannot be proper in this place, 

 it has been partly done already, and will be further treated of in 

 he course of this work. In the mean time, it may be proper to 

 bserve, that there is not so much occasion for distinguishing 

 between the idiopathic and sympathic dyspepsia, as there 



in many other cases of idiopathic and sympathic diseases. For, 

 as the sympathic cases of dyspepsia are owing to a loss of tone 

 n some other part of the system, which is from thence commu- 

 nicated to the stomach ; so the tone of the stomach restored may 

 je communicated to the part primarily affected ; and therefore 

 the remedies of the idiopathic may be often usefully employed, 

 are often the remedies chiefly employed in sympathic dys- 

 pepsia. 



" The sympathic cases, however, are by much the most fre- 

 quent, and unless they are discerned, our labour may be lost. 

 The principal cases are : Dyspepsia febrilis, paralytica, hy- 



