678 RUBBER 



are not sufficiently advanced. No satisfactory tests on 

 raw rubber which have so far been accepted are of any 

 use in enabling authoritative statements to be made as 

 to the value of different methods of coagulation and 

 curing; nor is the market value, which at one period 

 fancies crepe and at another smoked sheet, any criterion, 

 since these values depend possibly on supply and demand 

 for different grades for specific purposes and the fancy 

 of the buver. 



