AND YELLOW FliVER INTO ONE ANOTHER. 813 



deaths from cholera in London ; 2,330 of which 

 occurred in July, August, and September, while 

 in 1833, nearly the whole mortality occurred in 

 August and September. In the course of July 

 and August, it swept off 15,000 individuals in 

 the city of Mexico, the population of which was 

 200,000 ; and 8,253 in Havanna, out of 65,000 

 inhabitants. (Lancet of Jan- 6th, 1835.) 



A still more decisive proof that cholera, dysen- 

 tery, and other diseases of the digestive organs, 

 belong to the same genus as fever is, that they 

 are convertible into each other, according to the 

 state of the weather. As an example of this, 

 epidemic cholera made its appearance in New 

 Orleans in the summer of 1833, during a succes- 

 sion of cold and heavy rains, after which the 

 weather became hot and dry, when the disease 

 assumed the form of malignant yellow fever, 

 which continued with great violence until arrested 

 by frost.* It is also well known, that in Balti- 



* The fact is, that blue cholera, like the worst forms of typhus 

 and dysentery, is in most cases an undeveloped fever, or one in 

 which the cold stage remains throughout the disease : for in all 

 the milder cases, there was more or less fever, which often pre- 

 sented typhoid symptoms. What Sydenham said of Dysentery, 

 may be said of cholera, that it is " a fever turned inwards," 

 or one in which respiration is so far diminished, that there is not 

 animal heat enough obtained to produce reaction. And I have 

 frequently observed the same thing in the worst forms of yellow 

 fever, which, as before stated , is sometimes attended with buboes, 

 regarded by many as peculiar to the oriental plague. But 

 the essential character is the same in both, which are brought 

 on by modifications of the same causes, and require the same 



