iO The American Museum of Natural History 



manyfold because the individual specimens may be removed from the 

 cases and utilized for close observation. 



Owing to the growing interest in questions of public health, a 

 number of folios pertaining to public health have been added to the 

 series. These comprise photographs illustrating the sources, spread 

 and prevention of contagious diseases, the part played by insects in 

 carrying disease, and bacteria and their work. These public health 

 folios were prepared under the immediate direction of Professor C.-E. 

 A. Winslow, Curator of the Museum's Department of Public Health. 

 They are in great demand, especially by the teachers of High Schools, 

 and their further duplication is desirable. Recently the first series 

 of Public Health Charts, namely, "The Spread and Prevention of 

 Communicable Diseases," has been issued in printed form on cloth- 

 backed paper, 22 x 28 inches. Now there are 250 sets of these 

 charts available for the New York Schools, and a limited number 

 can be sold to other educational organizations. 



The following statistical table illustrates the growth of this 

 branch of the work: 



Growth of the Circulating Nature Study Collections 





1904 



1905 



1906 



1907 



1908 



Number of Collections in 













Use 



120 



400 



435 



450 



484 



Number of Schools of 













Greater New York 













Supplied 



115 



200 



300 



325 



383 



Number of Pupils Study- 













ing the Collections 



250,000 



375,000 



800,000 



725,000 



575,801 





1909 



1910 



1911 



1912 



1913 



Number of Collections in 



435 



390 



512 



537 



597 



Use 













Number of Schools of 













Greater New York 













Supplied 



419 



334 



486 



491 



501 



Number of Pupils Study- 













ing the Collections 



922,512 



839,089 



1,253,435 



1,275,890 



1,378,599 





1914 



1915 



1916 



1917 





Number of Collections in 













Use 



675 



671 



704 



712 





Number of Schools of 













Greater New York 













Supplied 



470 



473 



439 



446 





Number of Pupils Study- 













ing the Collections 



1,273,853 



1,238,581 



1,118,322 



1,075,076 





