Periodical Literature. 467 



About 47 per cent of the total area of 

 Afforestation Korea is still under forest, although reck- 



in less cutting has almost denuded the moun- 



Korea. tains, especially in the Southern part. The 



government has established nurseries with 

 the idea of educating the people to the importance of tree plant- 

 ing. Several large firms have started reforestation and have plans 

 for planting up areas varying from 4,000 to 30,000 acres, totaling 

 more than 50,000 acres. The area of the whole country is about 60 

 million acres. The trees found in Northern Korea are Chamae- 

 cyparis, larch, fir, birch, pine and others ; in the Southern part, 

 oaks, walnuts' and pines. 



American Lumberman, P'ebruary, 191 3. 



BOTANY AND ZOOLOGY. 



Wood A few points in wood identification are 



Identification. brought out in an article, not signed but 



apparently from the Forest Service, in the 

 Hardwood Record : 



1. Hollywood — fibers are marked with spirals. 



2. Cucumber — vessels with ladder-like or scalariform markings. 

 Tulip poplar — vessels with ordinary bordered pits. 



3. Birch — vessels with scalariform markings. 

 Maple — vessels with ordinary pits. 



4. Willow — marginal cells of pith rays irregular and different 



from the rest of the ray cells. 

 Cotton-wood — ray cells all alike and elongated in one di- 

 rection. 



5. Hackberry — same as willow in (4). 

 Elm — same as cottonwood in (4). 



Analogous to the use of parasites in 

 Parasites combating insect pests, a method which 



of has been so successfully inaugurated by 



Fungi. American entomologists. Dr. Tubeuf pro- 



poses to fight fungus pests through their 

 parasites, and discusses as a first example the parasite of the 

 Peridermium strobi, the white pine blister rust, which we are 



