POWER OF CALCULATION. 467 



possesses the attribute of courage ; in the case, for instance, 

 of the dog braving the tiger (Watson). 



In age and disease, mental and bodily, there is frequently 

 a loss of the usual power of measuring distance or height, or 

 of estimating an animal's own strength, or other ability, 

 physical or mental : the consequence of which is self-injury 

 in various forms and to various degrees. 



