PREFACE. y 



I am also specially indebted to my friend Dr. E. S. 

 Crosier, of this city, who has taken a great interest in the 

 work since its beginning, for valuable assistance in the 

 preparation of the text. Most of the descriptions have 

 been carefully revised by him, a courtesy I greatly ap- 

 preciate. 



J. W. 



Louisville, Ky., May i6, 1878. 



f.ZT. ^''^"ONS are etched on metal plates, afterward trans- 

 ferred to lithographic stone, thus enabling the work to be published 

 at a much cheaper price than if the copies were printed direct from 

 the plates. They were printed by the Louisville Lithographic Com- 

 pany, who are to be thanked for the interest they have taken in the 

 matter, m getting clear and sharp impressions, in every respect as 

 well done as if they had been printed direct. 



