THE ANIMAL AS A MOTOR. 



8i 



to the exact requirements of the work proposed to be 

 done, to be handled in such manner as to give him 

 maximum returns for his expenditures, and to be made 

 to produce large commercial results throughout the 

 period of their use. Fortunately, a wise regard of 

 these principles results in giving the man or the animal 

 highest health, in insuring him against overwork, and 

 in encouraging high spirits by the supply of good food, 

 permitting ample allowance for sleep and rest, and 

 prolonging the period of useful hfe. In exceptional 

 cases the animal machine must be exposed to deleteri- 

 ous influences, overstrain, or liabihty to serious acci- 

 dent ; but these cases can usually be made extremely 

 rare by intelligent engineering, and, in the case of 

 man at least, the individual so exposed receives what 

 is thought by him satisfactory compensation for the 

 risks so taken. 



In the selection of the man or animal for a specified 

 work, the wise and experienced engineer, or his con- 

 tractor, looks for light, active, spirited creatures for 

 light work, heavy and powerful, though slow, animals 

 for heavy work, and can usually find just that com- 

 bination of qualities of body, intelligence, and spirit 

 which his experience teaches him are best for the 

 specified purpose. The racehorse, the roadster, the 

 hackney, and the draught-animal all have their special 

 parts to perform. Neither can satisfactorily do the 

 work of the other ; and the same is true of man, 

 whether performing purely manual labor, working at a 

 trade, or taxing his mind in the direction of an indus- 

 trial army or otherwise. For every sort of task there 

 is to be found a kind of man specially and peculiarly 

 adapted to its successful accomplishment. Not only 



