100 GOODYEAR ON GUM-ELASTIC 



bag, SO as to prevent the slide from coming off, and it is locked 

 on by a padlock at the end. 



This stop does not make the bag so completely water and air 

 proof as the two kinds of stops before described, but it is more 

 cheaply manufactured, and renders bags sufficiently tight to 

 answer as life-preservers, when filled with apparel, and it is ex- 

 ceedingly convenient to slip off and on in use. 



CORKS.* 



As there is something in the manufacture or use of the differ- 

 ent sorts peculiar to each, they are separately described as 

 follows : 



PHIAL AND BOTTLE CORKS. 



The cheaper kinds of these are made plain like common 

 corks. Like other gum-elastic corks, they are made of sponge 

 in moulds, like hollow-ware. They are sometimes made with a 

 rim, as in the plate , fig. , to prevent the cork being driven 

 into the bottle. A somewhat more expensive, but more com- 

 plete article, is made with a metal eye, and also with a metal 

 plate and eye, as represented in the diagram, fig. 2 and 3. 

 They may not only be drawn by the eye, with a fork or nail, 

 but may be safely connected with the phial or bottle by a gum- 

 elastic cord looped to the eye at one end, and the phial or bottle 

 at the other, see plate , fig. . When it is considered that 

 one of these corks will ordinarily last much longer than the vessel 



* The English house of Mcintosh & Co. were the first to manufacture India rubber corks, which 

 were made by them of rope or felt, covered with native gum-elastic, as early as the year 

 These have been used to considerable extent, but they have been found defective for general pur- 

 poses, from the defects of the native gum. 



