212 GOODYEAR ON GUM-ELASTIC, 



SPONGE CORD. 



This article is of any size or siiape required, and is made non- 

 elastic when desired, by a cord or wire in the middle. It is 

 manufactured either by cutting it from sheets of sponge fabric, 

 or forming it vvith^ grooved calenders, or it may be more perfectly 

 formed in moulds like hollow ware. Its most important, if not 

 its principal uses, will probably be that of caulking between the 

 planking and boarding of floors and vessels, and the making of 

 trunks and packing boxes water and air tight, for the packing of 

 doors and window-sashes, and coach and car window-sashes. 

 See Vol. II., page 



-tS^liji 



