CONTENTS. 



Page. 



Letter of Transmittal 3 



Prefatory Letter 5-6 



First Part 7-49 



Bird Migration in the Mississippi Valley: 



Introduction 9_10 



Theoretical Considerations 11-12 



Speed at which Birds Migrate 12-16 



Eelation of Migration to Barometric Pressure and Temperature 16-25 



A Study of the "Bird Waves" which passed up the Mississippi Valley 



during the Spring of 1884 ■. 25-33 



Synopsis of Migration at Saint Louis from January 1 to May 27, 1884. 33-37 

 Progress of Vegetation and Awakening of Animal Life in the Missis- 

 sippi Valley during the Spring of 1884 37-41 



List of Stations and Observers for 1884 41-43 



List of new Stations and Observers for 1885 43-44 



Form of Schedule used in 1885 45 



Notes on the Migration and Distribution of each Species reported as in- 

 habiting the Mississippi Valley .... 46-49 



Second Part 51 



Systematic Eeport „ 53-295 



Index 297 



