the total served at the end of the year to 500, a figure which repre- 

 sents the largest number of participants in this service in the history 

 of the Extension. 



Except for the few recent additions to the schedule, each school 

 had the use of at least twenty-four exhibits as visual aids to ele- 

 mentary science teaching. Many of the exhibits in circulation, 



Fig. 4. A collection of diverse Museum material available to Chicago teachers 

 through the Harris Extension. 



such as those dealing with mining, metallurgy, spices, beverage 

 plants, fibers, plastics, and other economic products, acquired a 

 timely interest because of the war. Unsolicited comments from both 

 teachers and principals unanimously praise this Museum service to 

 Chicago schools. 



Since the lending service of the Museum now includes practically 

 all of the public schools, increase in the number reached is to be 

 expected only through the gradual growth of the public school 

 system and the inclusion of more denominational schools. Of those 

 receiving Museum cases at present, public schools of all kinds num- 

 ber 402, while denominational and private schools, and social 

 agencies number only eighty-eight. Yet the number of schools 

 maintained by religious organizations exceeds 300, and, in general, 

 they are giving science instruction greater emphasis. Hence requests 

 from schools in this group for their inclusion in the lending service of 



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