38 



white ash attains a higher price than that of 

 home-grown trees. 



15. Juglans nigra, L., Black Walnut, 



The planting of this tree, according to the data 

 of Schwappach, has been reduced considerably in 

 Prussia from 84"03 acres in 1890 to 31 "85 acres 

 in the aggregate in 1900. This reduction in the 

 trial planting areas seems in the first place due to 

 unsuitable sowing, which caused a late germina- 

 tion of the seed. A limitation of the planting 

 areas of this tree to the climatic warmest situa- 

 tions in Germany is not necessary, as it has been 

 planted with care (naturally not in the open) at 

 an elevation of 1,700 feet in Southern Germany. 

 It is sufficient if it has good soil and warm 

 situation where the oak still thrives. From the 

 numerous failures the conclusion must not be 

 drawn that it is difficult to raise the tree, or that 

 unfavourable results with timber produced in 

 Germany are to be made. On the contrary, 

 timber from trees grown in Germany has the 

 same specific gravity, according to Nordlinger ^ 

 and Mayr,2 and the same beautifully coloured 

 heartwood, as that in America. Only the very 



' "Das Vorkommen auslandischer Holzarten in Wiirttem- 

 berg," "A. F. u. J.," 1882, p. 174. 



= "Das Holz der empfohlenen exot. Laubholzarten," "F. 

 Zentralblatt," 1884, p. 136. 



