HARMONY OF ORGANIZATION. 91 



tlioroiigh-bred is as ill adapted for the dray. Animals are 

 therefore to be selected for the individual purposes for which 

 they are intended, with the modifications or organization re- 

 quisite for the different uses to which they are to be applied ; 

 but for whatever purposes they may be intended, there are 

 some organs which are common to all, in the adjustment of 

 the individual parts. If the bones, in the case of the horse, 

 want their due proportions or are imperfectly placed ; if the 

 muscles or tendons want their proper levers ; if the flexions of 

 the joints be interrupted by the defectiveness of their mechan- 

 ism ; the animal must be defective in motion or strength ; the 

 bones have irregular pressure, and if they do not break become 

 diseased; if the muscles or tendons do not become sprained or 

 ruptured, they are defective in theit action ; if friction or in- 

 flammation does not take in the joints, the motions are awk- 

 ward and grotesque. As in every other machine, the beauty 

 and strength of the animal, whether in motion or at rest, 

 depends upon the arrangement of the individual parts." 



In making this long quotation we have a twofold object in 

 view ; one is to show that in the necessity of this harmony or 

 balancing of organization, illustrated in the history of the 

 horse, there is strong presumptive evidence that there must 

 exist a great general law of propagation in the perfect struct- 

 ure of all the- organs of the body, and then would follow this 

 harmony or balance in the performance of their functions. 

 The same evidence that proves the necessity of a part or frag- 

 ment of the law of inheritance, demonstrates the existence or 

 truth of the whole law. 



Another object or design of the quotation is to show that 

 if there must be this perfect development in the framework 

 of the horse, with all its nicely adjusted parts, in order to 

 give beauty, speed and strength, how important that those 

 vital organs, — the heart, the lungs and the digestive organs, — 

 be well developed and kept in sound running order ! and 

 then that this same illustration be applied to other domestic 

 animals. But the idea of having a perfect organization in all 

 its parts conflicts at once with the specific uses which we have 

 •for domestic animals. Utility here is the controlling consid- 

 eration, to which all other things must be made subservient. 

 The ox is wanted for labor or beef, the cow for meat or milk, 



