14 ANIMAL PHYSIOLOGY. 



feet, since its organization prevents it from breathing 

 the air or walking on the earth. On the contrary sight, 

 instruments for rising in the air, and for walking on the 

 earth, are absolutely necessary for the higher orders of 

 animals, otherwise they would be unable to accomplish 

 the ends for which they were created. 



The student will also be able to notice, that the Cre- 

 ator has employed the strictest economy with respect 

 to animal organization, every individual being in posses- 

 sion of all the instruments and means with which to ac- 

 complish the ends of its creation, but no more. No su- 

 perfluous organs are bestowed on any, even of the fa- 

 vorites of nature, but always a sufficiency for every 

 destined purpose, both with respect to number and 

 power. 



In the details of the habits and physiological functions 

 of some of the lower orders of insects, the pupil will prob- 

 ably often find himself greatly excited by curiosity, but 

 it is hoped that he will not therefore neglect or forget 

 the chief design of this work, which is to bring him to 

 the acknowledgement and adoration of a Great First 

 Cause, by making him acquainted with the mechanism 

 and functions of His animated creation. 



What is said with respect to the economy employed in animal organ- 

 ization ? 



