SMALL-POX. 437 



of the eruption are, the age of the dog, and the temperature of 

 the situation and of the season. The eruption runs through its 

 different stages with much more rapidity in dogs from one to five 

 months old than in those of greater age. I have never seen it in 

 dogs more than eighteen months old. An elevated temperature 

 singularly favours the eruption, and also renders it confluent and 

 of a serous character. A cold atmosphere is unfavourable to the 

 eruption, or even prevents it altogether. Death is almost con- 

 stantly the result of the exposure of dogs having small-pox to any 

 considerable degree of cold. A moderate temperature is most 

 favourable to the recovery of the animal. A frequent renewal 

 or change of air, the temperature remaining nearly the same, is 

 highly favourable to the patient ; consequently, close boxes or 

 kennels should be altogether avoided. 



" I have often observed that the perspiration or breath of dogs 

 labouring under variola emits a very unpleasant odour. This 

 smell is particularly observed at the commencement of the desic- 

 cation of the pustules, and when the animals are lying upon dry 

 straw ; for the friction of the bed against the pustules destroys 

 their pellicles, and permits the purulent matter to escape; and 

 the influence of this purulent matter is most pernicious. The 

 fever is increased, and also the unpleasant smell from the mouth, 

 and that of the feces. In this state there is a disposition which 

 is rapidly developed in the lungs to assume the character of 

 pneumonia. This last complication is a most serious one, and 

 almost always terminates fatally. It has a peculiar character. It 

 shows itself suddenly, and with all its alarming symptoms. It is 

 almost immediately accompanied by a purulent secretion from the 

 bronchi, and the second day does not pass without the characters 

 of pneumonia being completely developed. The respiration is 

 accompanied by a mucous rdle, which often becomes sibilant. 



