10 DEPARTMENT OF AGRICULTURE BULS. 801-825, 



Department Bulletin No. 824. — Insect Powder: Page. 



Purpose of investigation : i 



Definition 1 



History : 2 



Cultivation and harvesting of insect flowers 4 



Preparation of insect powder 10 



Effect of insect powder on insects 13 



Effect of insect powder on animals 14 



Adulteration of insect powder 16 



How to detect adulteration 21 



Physiological methods 21 



Microscopical methods 23 



Chemical methods 32 



Sumniary of methods 45 



Authors' method 46 



Active principle of insect powder 65 



Previous investigations 65 



Experimental work 74 



Distribution of the active principle in Chrysanthemum cinerariaefolium 79 



Summary 82 



Bibliography 83 



Department Bulletin No. 825. — Rural Community Buildings in the 

 United States: 



Growing interest in community buildings 1 



Community buildings classified according to source of funds for their 



establishment 2 



General character of the buildings '": 



Maintenance. . . '. 5 



Operation and management 5 



Uses to which buildings are put 5 



Specific examples of community buildings 6 



The community house, Holden, Mass 6 



The Matinecock neighborhood house, Locust Valley, Long Island, ... 11 



Community building, Elgin, Nebr 16 



Red River Farmers' Club hall, Kittson County, Minn 22 



Tamalpais Center building, Kentfield, Calif 20 



Amusement hall, Ware Shoals, S. C 25 



Dixon township building, Argonia, Kans 28 



Rembrandt community building, Woodstock, Tenn 30 



List of community buildings selected from those visited or studied 



through correspondence 34 



