Periodical Literature 747 



The distinguishing feature of the lumber trade of the Pacific 

 Coast countries is the supremacy of the North American product ; 

 only in the Chilian port of Puntas Arenas is European lumber in 

 demand; 99 per cent of the importation into Chili and over 80 

 per cent of that into Peru are from the United States, a very 

 large proportion of the consumption being imported. Much of 

 the more accessible forest, it appears, has already been cut for 

 limiber or cleared for farming. The roble, the so-called Chilian 

 oak, the cheapest and most abundant native wood, besides its 

 weight, is most troublesome to season in the rainy latitudes of 

 Southern Chili. The Chilian pine (Araucaria) seems to be mainly 

 esteemed for the seed, like our Pinion pine; otherwise fit mainly 

 for pulpwood. 



Ecuador seems the only State without regular importation of 

 foreign timber, the home industry being highly protected. 



The lumber industry based on the Parana pine in Brazil was 

 rendered possible by the building of the Parana railroad and by 

 the fact that these araucaria forests occur in extensive pure stands. 

 It is carried on largely by North American lumbermen. 



Venezuela, in spite of its extensive forest area, imports 45 per 

 cent of the liimber consumption, mostly Southern Yellow pine, 

 which in the La Plata district goes by the name of Riga pine, 

 from its resemblance to the Russian Scotch pine, which it has 

 replaced. 



Special Agents Series 112 and 117, Bureau of Foreign and Domestic Com- 

 merce, Washington, D. C. 1916. 



BOTANY AND ZOOLOGY 



As bearing on the important theory of 



Incompatibility toxic effects of one species of trees on others 



of Oak and in mixture, Petri's investigation of the com- 



Olive Trees mon knowledge that olive trees are generally 



stunted in their growth when in the vicinity 



of oakwoods may be cited. 



In a series of pot cultures, in which olive and oak seedlings were 

 grown at 10 cm intervals, the one-year-old oak roots in contact 

 with olive roots showed the existence of small brown zones in 

 correspondence with which the primary cortex was in an advanced 



