PREEACE. Vll 



gion, an answer to those mysterious questions, 

 which Nature anxiously proposes, but cannot , 

 solve. 



In conclusion, the Author has to remark, that 

 he is indebted for much of the substance of the 

 Chapters on Zoology, and the Adaptations in 

 the formation of Animals to their appointed 

 modes of life, to Notes, taken while attending 

 the Lectures on Physiology, of Dr. Fletcher of 

 Edinburgh. It must at all times afford him 

 pleasure to acknowledge the benefits he received 

 from that gentleman's instructions, and the co- 

 louring which they have given to his own opi- 

 nions and practice. 



DUMFRIES, 1834. 



