204 GOODYEAR ON GUM-ELASTIC. 



made more or less liquid. Porous fabrics may also be made by 

 mixing with the compounds substances that are soluble in 

 water, which can be dissolved out. 



INDELIBLE GOODS. 



These are of three kinds. The first consists of fibrous fabrics, 

 silks, and other fancy stuffs, which are printed and afterwards 

 coated over with a thin coat of gum-elastic cement. 



The second kind consists of maps, globes, charts, carpeting, 

 table and piano covers, &c., which are printed or painted by 

 different methods, upon the various India rubber fabrics, and 

 being coated over in the manner before alluded to, the printing 

 and painting become indelible in every sense of the word ; so 

 much so, that they cannot be altered or removed by any art 

 of chemistry, without destroying the fabric. 



The third kind consists of carpeting, &c., in which the pat- 

 terns, or figures, or colors, are applied with a brush, or by sten- 

 ciling, the coloring material being a thick cement of dissolved 

 caoutchouc. 



This is an art which has not yet been practiced to any con- 

 siderable extent, but enough has been done with it to give 

 assurance that it will prove of great utility, when carried on 

 extensively. 



