202 GOODYEAR ON GUM-ELASTIC, 



CARD CLOTHS. 



This article, or at least its application as a substitute for leather 

 for machine cards, is originally an English invention. It was 

 first made of the native gum by cementing a number of woven 

 cloths together. Beside being used for the above purpose, it has 

 been found useful, when vulcanized, for some descriptions of 

 light belting, and particularly for the rail way belts of cotton 

 carding machines. 



COATED CLOTHS. 



Cloths of every description may be coated with compound 

 when it is desirable to make them water-proof or very durable, 

 with greater or less advantage. 



The writer considers them generally less useful than the 

 laminated fibrous fabrics called tissue, vellum, and plated fabrics, 

 although some of them, particularly very light silks, have the 

 advantage of greater strength in proportion to their weight, and 

 they can also be wrought into different articles by stitching, 

 better than the fibrous fabrics, which is often a convenience 

 to the purchaser. 



The uses of these cloths are already so well known, and their 

 application is so often referred to in the following pages, that a 

 further description here is considered unnecessary. 



