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82 GOODYEAR ON GUM-ELASTIC. 



PRINTER'S ROLLS. 



As of printing tympans, so of printer's inking rolls, it is a 

 desideratum with the trade to find some substitute for the com- 

 mon roll, made of molasses and glue. Experiments were made 

 with the native gum, and also with vulcanized elastic com- 

 pound, both of which failed from being too unyielding. Some 

 experiments are now being made with gum-elastic sponge, 

 which it is confidently expected will prove successful. 



COMPRESSING APPARATUS. 



This is the invention of another, for the purpose of salting 

 meats. It consists of two copper or iron cyUnders, one inserted 

 within the other, and connected by a belt of gum-elastic, as 

 represented by the diagram , plate 



The machine is designed for salting meats ins<,antaneously, or 

 at least in a very few minutes. It has been tried experiment- 

 ally, and found to answer most completely. The same principle 

 may also be applied to tanning hides, and to other purposes 

 equally well. It is a fact not generally known, that in some 

 climates where cattle are most numerous, as in some parts both 

 of North and South America, the beef cannot be salted at all. 

 Should these machines be found to answer the purpose of salting 

 in these countries, as they do here, it is an exceedingly im- 

 portant improvement, both as relates to those countries and the 

 world at large. Some individuals of enterprise in New York, 

 ai^e, at this time, giving their attention to this subject. Should 

 this application prove successful, a more minute account of the 

 apparatus, and the benefits resulting from its use, will be given. 



