814 GEOGRAPHICAL HISTORY OF CHOLERA, 



more and many others parts of the United States, 

 as in most other parts of the world, intermittent 

 fever will make its appearance in June ; and 

 sometimes assume the character of malignant re- 

 mittent, or yellow fever, as the season advances, 

 until there comes on a succession of cold rains, 

 when it suddenly changes to dysentery, which 

 continues until the commencement of frost, or a 

 change of weather from wet to dry. 



In his treatise on the epidemic cholera of India, 

 Mr. Orton says, that in Bengal, Bombay, and 

 the Carnatic, it prevailed chiefly during the south 

 west monsoons, and declined during the dry sea- 

 son, that like fever it followed the course of large 

 rivers, and was most fatal in the low, moist, filthy, 

 and ill ventilated portions of large cities, (p. 169.) 

 It was also ushered in at St. Petersburg, Warsaw, 

 and Vienna, by rainy weather, according to M. 

 Londe. And Dr. Jannechen says, that its fatality 

 in Moscow was in proportion to the hygrometric 

 state of the atmosphere. Moreover, like the black 

 death of the fourteenth century, the sweating 

 sickness of the fifteenth, the plague of the seven- 

 teenth, and in fact all other great epidemics, the 



general treatment. Like typhus, they often terminate with diar- 

 rhea and colliquative sweats, or transudation of the watery parts 

 of the blood through the capillaries of the skin, stomach, and 

 bowels, as in epidemic cholera, while it is worthy of notice, that 

 the colour of the skin which comes on a short time before death in 

 yellow fever, is owing to the effusion of serum through the coats 

 of the cutaneous capillaries into the celluJar tissue of the skin. 



