1 88 Nature-Study Agriculture 



8. Examine a manure heap in warm weather for the eggs, 

 larvae, and pupae of flies. 



9. Make a cage flytrap of wire screen. 



References 



"Commercial Fertilizers." Farmers' Bulletin 44. 

 "The Liming of Soils." Farmers' Bulletin 921. 

 "Barnyard Manure." Farmers' Bulletin 192. 

 "House Flies." Farmers' Bulletin 851. 



