35 



Raising and transplanting are very much hin- 

 dered by the very deep and very tender tap- 

 root. During the first ten years it is of slow 

 growth, and is usually overgrown by other indi- 

 genous species planted with it. 



The wood of trees grown in Germany has 

 proved just as valuable as that in America. 

 According to Prof. Dr. H. Mayr, 1 it has a 

 specific gravity of 75, and, from a note from 

 Nuremberg, excellent qualities as waggon wood. 

 The trees at present growing in Germany have 

 produced seeds which showed poor or no 

 germinative power at all. 



8. Gary a porcina, Nutt, Hickory, Pignut 



Hickory. 



Of this tree species, which is inferior to the 

 alba in the value of the wood, there were in 

 1890 in Prussia I9'62 acres, and in 1890 only 7-54 

 acres left, hence also a considerable reduction 

 of the trial plantation areas. Whether this 

 species was planted with the alba under 

 natural conditions, namely, in groups about one- 

 tenth of an acre in extent, is not to be seen 

 from the monograph. 



Wood from trees grown in Germany shows, 



1 Sargent, " Report on the Forests of North America," 

 Washington, 1884. 



