APPENDIX 



REPORT OF THE SECRETARY. 



REPORT OF THE ASSISTANT SECRETARY, SPENCER F. BAIRD, RELATIVE TO 

 EXCHANGES, COLLECTIONS OF NATURAL HISTORY, ETC. 



During the past year 763 principal packages have been received at the In- 

 stitution by the various channels of transportation, and 768 sent out from it — 

 being a considerable increase over the numbers of last year. 



The principal statistics of the exchanges will be found in the following tables 

 marked A, B, C, and D : 



A. 



Receipts of books, Spc., hy exchange in 1866. 

 Volumes : 



Octavo 922 



Quarto 226 



Folio 95 



1, 243 



Parts of volumes and pamphlets : 



Octavo 3,123 



Quarto 1, 103 



Folio 283 



4,509 



Maps and charts 121 



Total o, 873 



The corresponding receipts for last year were 4,206, showing an increase 

 of 1,667. 



