lis PAl'ULAR STAGE. 73 



both are necessarily the consequence of fever, and where both natu- 

 rally appear after the fever nearly at the same distance of time, it 

 would be impossible for the two to have their respective eruptions 

 even in different parts, because it is impossible that the two preceding- 

 fevers should be co-existent.' " 



Mr. JVIarson adds — 



" Unquestionably the examples are but few in which two febrile 

 diseases do occur at the same time in the same individual ; but the 

 rule is not without exception, nor any thing like it*." 



The incubative, oi' first stage of sheep-pox, will 

 doubtless be modified by the system being affected by 

 any similar disorder ; but whether incubation proves to 

 be long or otherwise, we find as a consequence of the 

 animal having received the poison, that an eruption 

 breaks out on many parts of the skin. This, which 

 may be called the second stage of the malady, is recog- 

 nized by the existence of 'papulce, or nodules deeplij 

 imhedded in the dermis, having a florid red aspect, (see 

 plate 1) : these shew a preference for some parts of the 

 integument, and are usually to be first detected on the 

 inner side of the arms and thighs, and on the cheeks 

 and lips, -svhere the animal has a hairy and not a 

 woolly covering. Other portions of the body are often 

 simultaneously attacked : as the prepuce, labia, anus, 

 and under surface of the tail, — parts which are per- 

 fectly nude. 



The eruption quickly extends, in most cases, over the 



whole skin, manifesting itself either in a distinct or con- 



Jluent form. l)ut we have observed that Down sheep 



are especially prone to the formation of the papulae on 



* An Essay on Variola and Scarlatina. Transactions of the Mcd'tco- 

 Chirurgical Society, vol. xxx. 



L 



