The side of SparOak 

 next the pulley is Spar- 

 tan leather, giving the 

 maximum grip on th 

 pulley. 



The outer part of 

 SparOak is firm, 

 heavy selected, 

 special oak tanned 

 center stock. 



^oie ike name- 



WS.S. 



WAR SAVINGS STAMPS 



ISSUED BY THE 



UNITED STATES 

 GOVERNMENT 



SparOak , 



* Belting 



That bruising drive! A constant 

 trouble maker — you find one belt 

 that has the pulley- grip to stand 

 high speed and fluctuating loads, 

 but it hasn't the stamina for long 



Another belt is tough as an 

 anvil, but it slips and leaks power. 

 Or, perhaps, it is a case of tight and 

 loose pulleys, or pulley flanges, or 

 step-cones, or continual shifting, 

 or some other heavy duty. 



Try SparOak — that double serv- 

 ice belt. Its pulley surface is 

 Graton 6c Knight Spartan Leather 

 — the highest frictional value ever 

 attained in belting. The outside is 



THE GRATON & KNIGHT MFG. CO., Worcester, Mass., U.S.A. 



Oak Leather Tanners, Makers of Leather Belting, Lace Leather, Packings and Specialties 

 Branches and Distributors in all Principal Cities 



GRATON & KNIGHT 



Standardized Series 



LEATHER BELTING 



Tanned by us for belting use 



special oak tanned from the finest 

 quality of heavy-center stock. The 

 combination gives a belt that not 

 only grips the pulley at high speed 

 with fluctuating load — but stands 

 the mauling of hard service con- 

 ditions. Drives that were driving 

 foremen gray-haired, behave them- 

 selves when equipped with SparOak. | 

 If there's such a drive in your 

 plant, don't delay a minute in learn- 

 ing about SparOak. For a whole 

 class of belting dilemmas it's the 

 answer. 



We have just prepared a book 

 for you on Standardization in Belt- 

 ing. It describes the character and 

 applications of SparOak, and the 

 others of our Standardized Series. 



"Mention tne Geographic — It identities you." 



