hodge] 



FLIES AS A NATURE-STUDY PROBLEM 



85 



enough to build one, we fail to see the use of publishing this 

 device . 



In connection with all the schemes and devices in the field 



TOP..JF.EAKE 



Remove- *o fcmpty traip 



HoU tvsry 3 



^ 



£V£ ry / 



', / ' / / / ; ' / Loose. ' -d 





Fig. 5. 



there are many so foolish, expensive and laborious that to even 

 mention some of them in campaign plans would only invite sure 

 failure. Since the failure of one member of the community to co- 

 operate may spoil the whole campaign, our plans must be so all 

 compact of pure goodness and common sense that everybody 



