460 APPENDIX. 



NOTES TO CHAPTER VI. 



P. 144. Acclimatization. — Acclimatization, i.e. use of ex- 

 otic species for forest growing, has been sparingly practised 

 except in planting where nature had not provided any native 

 forest flora, the reason being that native woods usually satisfy 

 the requirements, and that the long period of development 

 before the real character of the wood and the behavior of the 

 plant under new conditions can with certainty be determined 

 deters the attempts. There would, however, appear to have 

 been more hesitation than necessary on this last account. 

 Trees which have lived in a climate for a decade during their 

 infantile and youthful, tenderest stage, and behaved as in their 

 native habitat, are not likely to change their character later. 

 The Germans have for the last thirty years systematically 

 tested and introduced foreign, especially American, species, 

 with considerable satisfaction. Our white pine has been in 

 existence in German forest plantations for over one hundred 

 years and has been found most satisfactory. In Hungary 

 over 170,000 acres of our black locust furnish to the wine- 

 growers most satisfactory vineyard stakes. 



While it may still be considered safest to rely upon the 

 native flora, yet if exotics, climatically adapted, promise more 

 rapid growth, larger production, silvicultural qualities or quality 

 of wood superior to the native, as for instance the Norway 

 spruce, it is proper policy to supplant the inferior native, pro- 

 vided that no more is expected of it than it does and can do 

 in its native home. 



P. 157. Weight Production per Acre. — It is to be under- 

 stood that this equal weight production of various species 

 from year to year presupposes the species to be, at least in 

 general, adapted to the locality or site and climate; moreover, 

 this statement refers only to the actual experience with Ger- 

 man species in German climate and soils. This experience 

 merely proves the self-evident fact that the same amount of 

 water, sunlight, and temperature accessible in the same man- 



