VI 



In preparing the illustrations, no pains have been 

 spared to make them as complete as the extent of 

 analysis, and the size of the plate adopted, would al- 

 low. 



The drawings were made, under my immediate super- 

 vision, by Mr. August Schrader, a draughtsman of rare 

 merit. They w T ere engraved on copper by Mr. William 

 Dougal, equally distinguished in his art. 



W S. SULLIVANT. 

 Columbus, Ohio. 



