50 



GOODYEAR ON GUM-ELASTIC. 



ROOFING. 



One of the most frequent inquiries of those who speculate 

 upon the uses of India rubber is, Why is it not suitable for roof- 

 ing. A canvas substantial enough for this purpose, coated by 

 the former method, would have been too expensive. By the 

 present method, however, of plating such canvas with caout- 

 chouc and cotton fibre, a roofing may be made to answer ex- 

 ceedingly well, and not too expensive. 



