XIV 



PREFACE. 



13. Price List of Smithsonian Publications. 



Where no price is given the work is out of print, and cannot be furnished. 

 Of those marked "free" the edition is limited, and copies are only given to 

 those specially interested in the subjects to Avhich they pertain, who are col- 

 laborators of the Institution or contributors to its librarv or museum. 



