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/ 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. Carya 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, 



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

 Washington, 1884. 



