FURNITURE SPRINGS. HI 



springs. Specimens of door locks have been made by him, as 

 represented in plate xvi., fig. . The springs are simply- 

 small blocks of gum-elastic compound, which act by the elasticity 

 of the gum by compression against the bolt of the lock or latch. 

 It is believed that lock springs of this kind will be preferable 

 to steel, on the score of economy and durability, not being liable 

 to rust or to get out of repair. 



GUN LOCK SPRINGS. 



The use of vulcanized gum-elastic compound for gun lock 

 springs was also the suggestion of another,* and there is good 

 reason to suppose that it will be found useful for that purpose, 

 as it is for car and other springs. 



STIRRUP SPRINGS. 



This article is manufactured by inserting a piece of the stayed 

 compound fabric into the stirrup leather, near the stirrup. The 

 spring should be of the same width as the stirrup leather, one- 

 quarter of an inch in thickness, and from one to two inches in 

 length to suit the customer. 



The stirrup leather may be either of animal or vegetable 

 leather. 



The horseman will find this an improvement tending to his 

 comfort. See plate , fig. 



• Mr. John Greacen, Jr., New York. 



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