ORDER OF THE WORK. 



GENERAL INTRODUCTION. 



PART I. ^ 



ZOOLOtlY; 



BY JAMES E. DE KAY. 



2 



PART II. 



BOTANY; 



BY JOHN TORREY. 



(^ABT m.') 



MINERALOGY; 



BY LEWIS C. BECK. • I (»7 » M 



f PARTS IV. & V.N 



GEOLOGY AND PALEONTOLOGY; 



BY WILLIAM W. MATHER, EBENEZER EMMONS, LARDNER VANUXEM 



AND JAMES HALL. 



