56 GOODYEAR ON GUM-ELASTIC. 



UMBRELLA CLOTHS. 



Gum-elastic tissue, corded tissue, and plated muslins, are best 

 suited for umbrella coverings. The lightest description of 

 plated cotton musquito net is very suitable for this purpose. All 

 these fabrics may be made up with the needle, but are most 

 completely made up at the factories, as described under the 

 head of Umbrellas, Chapter 



BELLOWS COVERINGS. 



Among the many uses of these fabrics, there are probably 

 none to which they are more perfectly adapted than for the 

 covering of bellows. The fact of this important use of the 

 fabrics having been hitherto so little noticed, can only be ac- 

 counted for by its being lost sight of in the multitude of other 

 applications of the fabrics. Gum-elastic vellum is most suitable 

 for small hand and accordion bellows ; plated canvas and 

 vegetable leather for smiths' and organ bellows. With these 

 fabrics there is no loss of power, as is the case with animal 

 leather, by the escape of air through the pores. They are not 

 scorched or ignited from sparks like leather, and they are not 

 injured by water. They are, for these purposes, undoubtedly 

 more durable and cheaper than leather. 



INSTRUMENT COVERS. 



Instruments of various kinds are advantageously covered with 

 the fabrics. Musical instruments are well protected by them 



