TABLE OF CONTENTS. 
THE DEFINITION OF THE ELEMENT. 
EF, P.. Venriable.. .........05.-20c2 0058 6 
THE NATURE OF VALENCE. 
FF. ‘PP, Vewnnies}..... 0055 Se cee eee 
THE NATURE OF VALENCE (SECOND PAPER). 
BK. P. Venables i... oc 62. c nc > on Sa 
PRELIMINARY CATALOGUE OF THE BIRDS OF CHAPEL HILL, 
- N. C., WITH BRIEF NOTES ON SOME OF THE SPECIES. 
T. Gilbert Pearson. ..........55-.....0 0 33 9 
