82 



FOREST PRODUCTS 



The following table shows the imports of quebracho wood and extract 

 into the United States for the ten-year period 1907 to 191 7. It shows 

 the effect of the lack of tonnage due to the war on the imports. 



IMPORTS OF QUEBRACHO WOOD AND EXTRACT INTO THE UNITED STATES 



1907 TO 1917 



There is no import duty on quebracho logs coming to this country but 

 prior to October 3, 1913, there was a small duty imposed on the extract. 



In 191 2 the price of logs at South American ports was from $14 to $20 

 per long ton and for extract $80 to $85 per long ton. In 191 5 the 

 price of the extract had risen to |i 1 5 per long ton. 



MANGROVE BARK 



Mangrove bark has come into great prominence in the tanning 

 industry of this country. In the year 191 5, 20,041 lb. were imported at a 

 value of $565,805, which represented a greater value than that of any 

 other imported tanning material except quebracho. The Census of 

 1909 gives a consumption of $1,401,008 lb. of mangrove bark. Within 

 the past decade it is represented as increasing very materially. 



Mangrove bark formerly came principally from Portuguese East 

 Africa, Madagascar, and the East Indies. Within recent years, however, 

 large quantities have come from Venezuela and Colombia. 



Most of the mangrove bark consists of the so-called red mangrove, 

 Rhizophora mangle, Linn. This tree covers great areas of tidal swamp 

 throughout the tropical regions of both the eastern and western hemis- 

 pheres. Other varieties of rhizophora named black mangrove, of 

 Avicennia nitida and white mangrove Avicennia tomentosa also pro- 



