54 PHYSIOLOGICAL REMARKS. 



of the individual must be kept pure, and that purity is not left 

 dependent upon one solitary organ, but nature has provided the 

 lungs, liver, and kidneys to perform the office, and, in animals 

 who perspire through the skin, that organ in addition. The 

 dog, however, is not subject to perspiration (except from the 

 limited surface of the tongue) ; his skin has no follicles for that 

 purpose, and therefore it is more necessary that his lungs should 

 be of good size. The horse, on the contrary, sweats to a wonder- 

 ful degree, and is consequently capable of enduring exertion in 

 hot climates to a much greater extent than the dog, which, on 

 the other hand, bears a much lower degree of cold. This is also 

 a chief reason of the many and obstinate skin diseases to which 

 he is subject. 



In this hasty sketch of the anatomy and physiology of the 

 dog, I have endeavoured to explain all that is necessary to the 

 comprehension of his various diseases ; but when I come to speak 

 of some particular affections I shall be obliged to be somewhat 

 more minute in my descriptions. Of course it would be futile to 

 attempt more than such an account as will enable the amateur to 

 undertake their management, since a more elaborate treatise would 

 take up valuable space, and would only confound and perplex 

 those for whom this book is intended. 



Before proceeding to the description of each particular disease, 

 with its mode of treatment, it will be well to consider the best 

 mode of examining the dog, when presented to us as a patient 

 (and he is truly a patient), with humble, imploring eye, asking for 

 relief, and ready to submit to any reasonable amount of pain in 



