NO. 4 COOPERATIVE WORK OF THE INSTITUTION 2/ 



labeling, and installation of the collections. Cooperation with other 

 galleries and other institutions interested in art has been carried out 

 as opportunity offered : 



(i) By correspondence devoted to art subjects. 



(2) By exchange of photographs of art works. 



(3) By contributing matter relating to the collections for publi- 

 cation. 



(4) By publication of illustrated catalogues of the collections. 



(5) By lectures on the collections delivered in educational cen- 

 ters throughout the country. 



(6) By the temporary loan of art works for exhibition. 



(7) By circulating exhibits shown in art centers throughout the 

 country. 



(8) By permitting the copying of art works ; by permitting teach- , 

 ers to instruct their classes in the Gallery ; and by permitting portrait 

 painters to hold their sittings in Gallery rooms. 



(9) By exhibiting art works belonging to artists and collectors 

 seeking public attention, and by the care and display of collections be- 

 longing to other galleries during periods of repair or construction 

 of buildings. 



National Zoological Park 



The National Zoological Park is constantly cooperating with other 

 government departments and with non-government scientific estab- 

 lishments throughout the world. The following specific instances of 

 such cooperation are typical of its service to other institutions : 



(i) Cooperates with the Biological Survey in establishing breed- 

 ing experiments. 



(2) Furnishes animals to the Bureau of Animal Industry and the 

 Public Health Service for pathological investigations. 



(3) Has at numerous times aided the Bureau of Engraving and 

 Printing in obtaining portraits of animals for use on notes, bonds, etc. 



(4) Has furnished large quantities of fertilizer, etc., to the oflfice 

 of Public Buildings and Grounds. 



(5) Furnished needed materials for experimental work to the 

 Bureau of Standards. 



(6) Furnished birds, etc., and cared for birds and reptiles be- 

 longing to the Pan-American Union. 



(7) Furnishes anatomical material to educational and scientific 

 institutions throughout the country. 



(8) Through members of Congress, and otherwise, furnishes in- 

 formation to public institutions in various parts of the United States, 



