90 GOODYEAR ON GUM-ELASTIC. 



CAULKING. 



This is among the uses that have been suggested for the vul- 

 canized fibrous fabrics. The properties of the substance would 

 seem exactly to adapt it to such a use, but whether it will 

 answer, or if it should answer, whether it will not be too expen- 

 sive, remains to be proved. 



ENGINE PACKING. 



This article is made of gum-elastic felt, and is manufactured 

 extensively. 



Engine packing of heated or vulcanized gum-elastic felt, 

 is now becoming so well known, and so generally introduced, 

 both in the United States and England, that to treat of its 

 utility would be superfluous. 



BOX PACKING. 



Dry goods or other boxes for the transportation of merchan- 

 dise, may be packed and rendered tight by a cord of gum-elastic 

 sponge, drawn into the edges of the article to be made tight, as 

 specified of water-proof boxes and trunks, page , and of im- 

 proved sash, page 



