36 



OLEOKESINS OF SOME WESTEKN PINES. 

 ROSIN. 



Table 8 contains the constants of the various "rosins" as well as 

 the constants of a sample of commercial rosin from the Southern 

 States which represents a mixture of colophony from the longleaf 

 and Cuban pines: 



TABLE 8. Chemical and physical constants of rosins from various species. 



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