M W UALITY means "the degree of goodness or 

 ^^^r relative excellence. " The degree of excellence 

 ^ta^^, of Blue Seal tires is high — here's why — 

 First: the materials have been used to the 

 best advantage. For example, the new synthetic rub- 

 ber has been combined with natural rubber in various 

 ways so that the best characteristics of each can be 

 utilized. 



Second. In making the cord piles for the tire carcass, 

 it was discovered that rayon fibre was much stronger 

 and less susceptible to heat than cotton. This means 

 that a lighter weight tire can now be made with the 

 same strength as the older, heavier one. ( As a result 

 of this improvement, tire strength is aow 

 designated as "ply rating." 

 A tire marked as "eight ply 



rating" may actually have only six plies, but will be as 



.strong as the tire formerly having eight ply.) 

 Third: The high quality of Blue Seal tires has been 

 proved in hard war-time use by thousands of farmers. 

 Our production today is far greater than ever, but 

 we have not yet been able to produce enough tires 

 to meet the demand. We have on display in our home 

 office a Blue Seal tire which was put in service Sep- 

 tember 16, 1940. It was driven 59,400 miles before 

 recapping and has traveled 19,242 miles since. The tire 

 is still in such good condition that an additional life of 

 20,000 miles is anticipated. There are many similar 

 examples of Blue Seal quality throughout the state. 

 So when someone mentions "QUALITY" 

 in tires, think of Blue Seals 

 as an outstanding example. 



NEW! 



BLUE SEAL 



TRACTOR TIRES 



Wide base construction with full width 

 and depth tread. Tread bars beveled 

 at rear side for easy cleaning. Con- 

 tinuous center rib makes for smoother 

 riding and braces tread bars. 



BLUE SEAL MASTER 



HCAVY SIRVICC I 



TRUCK TIRES 



The newly improved Blue Seal heavy 

 service truck tires are now available. 

 All the latest engineering improve- 

 ments have been utilized to produce a 

 tougher, more durable tire. Entire 

 carcass is made of RAYON CORD 

 construction, thus reducing heat and 

 weight and increasing strength. Tough 

 tread rubber gives long wear. 



BLUE SEAL TUBES IMPROVED 



Butyl, a new, tough, synthetic rubber is now being used. This 

 new rubber holds air longer and is more resistant to tearing 

 and punctures than natural rubber. 



ILLINOIS FARM SUPPLY CO. 



608 South Dearborn Street Chicago 5, Illinois 



