II 



SITUATION AND OCCURRENCE 



The original Pine which still remains in those 

 parts of Pennsylvania covered by this investi- 

 gation is found in limited quantities at the 

 heads of the smaller streams and runs, and in 

 the more inaccessible parts of the mountains. 

 A magnificent growth of White Pine once cov- 

 ered the slopes of the mountains and the sides 

 of the ravines, overshadowing and enclosing 

 the smaller streams, and attaining its best de- 

 velopment about their headwaters. It spread 

 completely over many of the mountains, grow- 

 ing in mixture with Hemlock, or, in places, 

 nearly pure. Upon the best soils various hard- 

 woods grew with it. Many of the steep slopes, 

 where the soil is naturally poor and stony, are 

 either absolutely bare, or covered with a growth 

 of shrubs and worthless hardwoods, and capa- 

 ble of being reclaimed only after many years. 



The old White Pine which furnished the 

 data here employed was found upon the slopes 

 of narrow, deep ravines, and at the heads of 

 streams. It grew in mixture with Hemlock on 



