During the year the Museum's film production "Through These 

 Doors" was constantly on loan to various organizations and schools 

 as an educational service of the Museum. Because this film was 

 produced in 1950 and many of the scenes are now out-dated, an 

 entirely new film will be produced to take its place. Work on the 

 new film is now in progress, and it should be ready for public showing 

 and use during the coming year. 



Inspection, cleaning, and repair of films was carried on. Such 

 work is necessary to keep in perfect condition the Museum's Film 

 Library, which now numbers 101 complete productions and thou- 

 sands of feet of additional film on miscellaneous subjects. New and 

 replacement titles and sections of films damaged from constant use 

 were photographed and edited into their respective productions. 

 Films were sent out on loan to other institutions that requested them 

 for use as teaching aids in classroom study. 



PHOTOGRAPHY AND ILLUSTRATION 



It has always been a matter of deep satisfaction that we do not need 

 to go beyond our own staff to get photographic material for our 

 publications and exhibits. The Division of Photography prepared 

 about 1,500 negatives during the year and nearly 21,000 contact 

 prints. Enlargements, lantern slides, and kodachromes account for 

 an additional 2,300-odd items. A quantity of this material is sold to 

 the public for many purposes, much of it being used to illustrate 

 encyclopaedias, textbooks, and feature articles in magazines. During 

 the year distribution of color transparencies of our exhibits was 

 begun through the General Biological Supply House, a large organiza- 

 tion that supplies schools and colleges throughout the world with 

 materials for biological education. The co-operative endeavor 

 extends to students anywhere the use of our Museum exhibits. A 

 significant enlargement of the Museum's usefulness in science educa- 

 tion is anticipated through this medium. 



It is convenient, saves time, and makes for both efficiency and 

 economy in the operation of the Museum to have available for 

 consultation our own artists, who have been trained in museum 

 techniques and are aware of our publication and exhibition problems. 

 The Division of Illustration produced during the year more than 170 

 drawings for publication (among them two double-page layouts 

 and a cover for Chicago Natural History Museum Bulletin and 

 illustrations of animal material ranging from seashells and lizards 

 to birds and mammals) and accomplished a great many miscel- 



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