The 



Evans 



Improved 



Challenge 



Roller 



Bearing 



Ventilating This the Best! 



Apparatus. Why? 



No pull on the roof. No friction on 

 the pipe. Self acting. Operates 

 quicker and easier. A child can 

 operate a loo foot house. The only 

 roller bearing ventilating apparatus 

 on the market. Roller bearing is to 

 a ventilating apparatus as ball 

 bearing is to a bicycle. Illustrated 

 catalogue free. Address, 



QUAKER CITY MACHINE CO. 



Richmond, Indiana. 



