LAW OF CORRELATION. 313 



of the other senses are generally unusually developed. The 

 sense of touch, for instance, usually attains a delicacy that 

 is surprising when compared with that of the average person. 

 There are some instances of blind people who could tell colors 

 and shades of colors by the touch. 



People who are affected with color blindness seldom, if 

 ever, have an ear for music. In some blind people the sense 

 of smell is so highly developed that it is used in distinguish- 

 ing persons. Some blind people are enabled to perceive the 

 entrance of a stranger in a room by the sense of smell. Cats 

 which are white in color and have blue eyes are usually 

 blind. 



We could go on and enumerate a large number of examples 

 to illustrate the basis of this law and its influences. It cer- 

 tainly should be of interest to stockmen. An understanding 

 of it may be helpful in accounting for some of the many 

 disappointments in animal breeding. In this day and age, 

 we hear much about the desirability of having an all 

 purpose, general purpose, or dual purpose animal. By 

 such an animal in the horse world we would mean one which 

 combined the speed of the trotting horse, the strength of the 

 draft horse, and the docility of the coach horse all in one 

 animal. That such an animal would be desirable cannot be 

 doubted. It would be a most useful animal on any premises. 

 Can such an animal be produced with any degree of certainty 

 is another question. 



Practical experience would indicate that such a thing is 

 not possible. In some instances we may find animals which 

 in a measure have the requisites of an all purpose animal. 

 They will not stand the crucial test of comparison with the 

 best of any special class. The 1,300-pound horse has too much 

 weight to measure up with the lighter bodied, more angular, 

 fleet footed thoroughbred on the race course. The same thing 

 is true when compared with the trotting bred horse. On the 

 other hand, it cannot compare with the heavy draft horse 

 weighing a ton or more, when it comes to heavy pull. 



It may have the energy, the pluck and the willingness to 

 do its best, but it has not the weight, and that is what counts. 

 When the steam engine was first invented it was thought 

 necessary to have cog wheels and a track to correspond to 

 insure its usefulness in pulling a load. This idea failed and 

 the engine would not work. A light horse oftentimes fails to 

 pull a heavy load up a hill, but when part of the load is put on 



