PERIODICAL LITERATURE. 



In Charge: 



Botanical Journals, R. T. Fisher, C. D. Howe 



Foreign Journals, B. E. Fernow, F. Dunlap 



Propagandist Journals, H. P. Baker 



Trade Journals F. Roth, Walter Muleord 



FOREST GEOGRAPHY AND DESCRIPTION. 



The localities studied by Mr. William Coop- 



Rocky Mountain er are on the summit and eastern flank of 



Vegetation. Front Range of the Rocky Mountains and 



they lie between Mt. Tyndall and Stone's 



Peak, a distance of about fourteen miles. The areas are on the 



continental divide, and they have an average altitude of 12,380 



feet. Physiographically the author divides the region into the 



flat summit of the divide and the slopes similar to it and the 



glacial canyons ; and from the standpoint of vegetation into the 



alpine grassland and the forest. 



The alpine grasslands are of two types, the dry meadows occu- 

 pying the exposed slopes and ridges ; and the wet meadows in 

 the upper portion of the glacial canyons. The distribution of the 

 two forest societies is determined by the soil water content. 

 Pinus Ucxilis in almost pure stand covers the dry summits and 

 upper slopes of the ridges between the canyons up to the limit of 

 tree growth. The spruce — fir society {Picea Bngelmanni, Abies 

 lasiocarpa) is confined to situations where there is an abundant 

 soil water content, that is in the canyons. The fir is more abun- 

 dant near the streams, and seldom or never, in the region studied, 

 ascends to the timber line. 



At the timberline, Pinus Uexilis, even in the most protected 

 places, is irregular and contorted in habit, while Picea Bngel- 

 manni, even in the most exposed places persists in its upright 

 habit. The altitude of the timberline is practically the same 

 in the canyons as on the dry ridges, namely 10,900 feet. The 



