274 



Popular Science Monthly 



CONVEYING WIMG5 



The "Swat the Fly" Campaign Is 

 On. Here Is a New Trick 



WHILE the "swatter" has done its bit 

 toward final victory over the fly, it 

 has its disagreeable features. Strips of 

 sticky fly-paper and similar devices are 

 unsightly and disagreeable also. The 

 invention of Crystal Hilgers of Chicago, 111., 

 eliminates the unsight- 

 ly elements of the fly- 

 warfare. 



The invention is a 

 small box-like contriv- 

 ance with extending 

 wings connected with 

 a slowly rotating shaft 

 which leads into the 

 box and down into a 

 channel filled with ker- 

 osene. The wings are 

 coated with molasses. 

 The shaft rotates so 

 slowly that the flies 

 attracted by the mo- 

 lasses are not shaken off. When they 

 are inside, the kerosene fumes in the channel 

 affect them, and they drop down into the 

 container in the channel, which may be 

 drawn out from the side and emptied oc- 

 casionally. 



The captured flies are at no time visible 

 except when the container is emptied. 



SPRING 

 ECHANISM 



WINDOW^ HP^XECUTION CHAMBER 



DRAWER 



The flies are lured into the chamber by 

 molasses on the slowly revolving shaft 

 wings, and are dropped off into kerosene 



Going to College to Learn 

 Wood Graining 



ANEW sort of school, designed solely 

 to benefit the man who cannot afford 

 to leave his home to acquire a broader 

 knowledge of his profession, has been 

 established in Iowa by the State College at 

 Ames. It is a short course for the painter 

 and decorator whose 

 education and training 

 in his profession has 

 been of the "pick-up" 

 variety. 



Each year painters 

 and decorators from 

 over the state gather 

 at the college to spend 

 four weeks in more de- 

 tailed study of the 

 scientific principles of 

 painting and decorat- 

 ing. Two additional 

 short courses are con- 

 ducted under the di- 

 rection of the college. These courses last 

 one week, and are usually held in the differ- 

 ent cities as the result of some arrangement 

 with the local commercial club or some 

 other public organization. In the evening 

 sessions there are lectures and discussions 

 of individual problems. This is believed 

 to be the first school of its kind. 



Pupils of the Iowa State College Traveling School studying the best ways to grain 

 wood. Every student is under the supervision of an expert instructor in the art 



