176 GOODYEAR ON GUM-ELASTIC. 



the heat is raised too rapidly, and also from the generation of 

 gases. 



The discontinuance mostly of the use of solvents in working 

 the gum for some years past, together with the experience 

 acquired in the manufacture, have overcome the difficulties 

 that are alluded to, so that they no longer exist m an established 

 manufactory, which renders the foregoing remarks less neces- 

 sary than they otherwise would be ; but as it is supposed that 

 the use of turpentine or other solvents will again be resorted to 

 to a great extent for the manufacture of some of the fabrics, it 

 is deemed that the statement of these particulars will be found 

 useful, especially to those who are unacquainted with the 

 manufacture. 



