RULES FOR DISTRIBUTION. 



either directly from the Institution or of its agents, Dodd, Mead, & 

 Co., New York; B. Westermann & Co., New York; American 

 Naturalist Agency, Salem, Mass. ; Wm. Wesley, 28 Essex Street, 

 Strand, London. 



Works not priced in the following list are to be considered as out 

 of print, and not to be supplied. 



JOSEPH HENRY, 



Secretary S. I. 

 Smithsonian Institution, 



Washington, July, 1877. 



RULES FOR DISTRIBUTION. 



TO INSTITUTIONS. 



The publications of the Smithsonian Institution are furnished : — 



1st. To Learned Societies of the first class, which present com- 

 plete series of their publications to the Institution. 



2d. To Libraries of the first class, which give in exchange their 

 catalogues and other publications ; or an equivalent, from their 

 duplicate volumes. 



3d. To Colleges of the first class, which furnish catalogues of their 

 libraries and of their students, and all other publications relative to 

 their organization and history. 



4tb. To Public Libraries containing 15,000 volumes. 



5th. To Public Libraries containing less than 15,000 volumes, 

 where a large district would be otherwise unsupplied. 



Gth. Institutions devoted exclusively to the promotion of particular 

 branches of knowledge may receive such Smithsonian publications 

 as relate to their respective objects. 



TO INDIVIDUALS. 



The distribution to individuals, of the publications of the Insti- 

 tution, is restricted : — • 



1st. To those who are engaged in original research in the branch 

 of science to which the book asked for pertains, or to whom it is 

 necessary in the business of instruction. 



2d. To donors to the Museum or Library of the Institution. 



