ORDER OF THE WORK. 



GENERAL INTRODUCTION. 



PART I. 



ZOOLOGY; 



BY JAMES E. DE KAY. 



(part II. 



BOTANY; 



BY JOHN TORREY. 



(>ABT m. "^ 



MINERALOGY ; 



BY LEWIS C. BECK. 



r PARXS IV. & T/N 





I(i7t»1 



V. 



(p'\S'St\ 



GEOLOGY AND PALAEONTOLOGY; 



BY WILLIAM W. MATHER, EBENEZER EMMONS, LARDNER VANUXEM 



AND JAMES HALL. 



