386 



PLANTS AND MAN 



and leather dressing. Rosin is used mainly in the paper, soap, 

 and paint industries, and minor amounts in the manufacture of 

 greases, printing ink, linoleum, oilcloth, etc. 



Fig. 248. — Tapping a long-leaf pine in Floi i(l;i, colh ( lin^ tin k ^ 



the turpentine (also Florida). {Courtesy U. S. Forest Service.) 



Another oleoresin of some importance is the so-called Canada 

 BALSAM, an exudate of the balsam fir of northeastern North 

 America. This is collected from blisters which form on the bark, 



t 



