Blood Diseases. 



179 



in the strict sense ; they do not propagate by inoculation. 

 Thus the poison from the blood of a diseased animal does 

 not produce the same disease, but a blood poisoning of 

 a virulent and rapidly destructive character, and this 

 forms the essential difference between the maladies now 

 under consideration and those to be described in 

 Chapter XVI. 



Purpura Hemorrhagica. — This serious affection is 

 also known as Acute Anasarca, and Sanguineous Dropsy, 

 both of which fail to enlighten the non-professional 



Purpura Hemorrhagica. 



reader. It partakes of none of the essentials of an 

 inflammatory disease. The condition of the blood is 

 such as to favour an infiltration of the fluid portions, 

 being blood-stained, within all sub-cellular spaces, and 

 even into the substance of the skin, internal organs, &c. 

 In fully developed cases it is not uncommon to behold a 

 sufferer standing calm and motionless, while large drops, 

 and even streams, of a bloody fluid from a thousand 

 spots, oozes through the hair, and trickles downward to 

 the ground. Large swellings also appear over and 

 beneath the body and legs, but especially at those parts 



