630 THE DISEASES AND DISOEDERS OF THE OX. 



and wonderfully important as it is. Those of our readers, how- 

 ever, who can form any conception of the incalculable suflfering 

 caused by those all-too-common tumours — the cancers — in man 

 will in some way grasp the importance of the relationship be- 

 tween the tumours of the domesticated animals and those of 

 human beings ; and, indeed, the same is true in regard to the 

 importance of the relationship of the other diseases of man and 

 animals. 



This science, that is this science of the relationship of the 

 diseases, goes by the name of Comparative Pathology ; and it is 

 indeed a great science, for most certainly the intense importance 

 of our lives has a much wider and a far deeper basis, a more far- 

 reaching significance than may at first sight be generally seen. 

 Yet, though we cling to life with all the power of our most 

 determined will, we are very apt indeed to cling to it in wrong 

 and unwise ways, and there is no one — however great he be — 

 who does not at times do well to re-consider from an entirely 

 new standpoint his position as a living unit in this world of 

 animate existence. There is indeed no one who does not at 

 times do well to study the laws of hygiene, and the necessity for 

 preserving a healthy mind in a healthy body, and the great 

 purpose and object for which he was born into this world. 



In these pages we have indicated the relationship of the 

 diseases termed tuberculosis^ scarlet fever, anthrax, actino- 

 mycosis, and many others of oxen, with the same diseases in 

 man. And similarly there is a relationship between the tumours 

 of man and animals. Yet in these pages we must restrict our 

 remarks to the subject under immediate consideration, and leave 

 its side issues for those especially interested. 



Varieties of Tumours. 



The ordinary epidermal growths from the skin, the angle- 

 berries, are very commonly met with in oxen, and they are very 

 similar to those of horses. They occur, as a rule, in small 

 numbers, and usually grow on the inside of the thigh and on 

 the legs, just as in horses. The removal of these growths pre- 

 sents no difficulty, as a rule, but in most instances surgical 

 treatment is not called for. 



A second kind of epidermal growth like warts varies in size 

 from a pea to a man's fist. It may occur in almost any part of 



