2 20 FORESTRY IN SWITZERLAND. 



Jiatcs of periodical growth of seven different species, by decades (Zurich). — Continued. 



RATES OF GROWTH AT HIGH ALTITUDES. 



A comparison of the foregoing results with those obtained from similar 

 Experiments in the Upper Engadine, as shown in the succeeding tables, show 

 how great an advantage forest owners in the lower hills, say 500 meters above 

 the sea-level, possess over those in the mountains 1,500 to 2,000 meters above 

 the sea, as, for instance, in the case of lichens and larches, which, during their 

 first hundred years of growth, gain six times as much in bulk in the former 

 localities as they do in the latter. 



