FOREST FORMATIONS AND FOREST TREES 



49 



of Colorado is rapid and all that is needful to insure the reforestation of 

 old lands is careful supervision and protection. It matters little from the 

 standpoint of the botanist or one interested in forests how this protection 

 is attained. It may be done either by federal or state authority. Private 



Douglas Spruce Engelmann Spruce 



Fig. 44. — Spruces and Fir. Xf 



Sub-alpine Fir 



supervision of forest lands elsewhere, at least, has not been successful. 

 Not only must illegal cutting be prohibited but fires must be kept out. 

 If this is attended to the forests will take care of themselves. 



The waste and desolation which come in the wake of forest destruc- 

 tion is well known. France has spent millions of dollars in reforestation 

 of mountain slopes. Spain, Greece, Turkey, northern Africa and China 



