within 10 years to 75 per cent, in 15 years to 40 per 

 cent, and in 20 years to 16 per cent of the present 

 cut, and in 25 years the timber will be practically 

 gone. Cutting for other purposes than lumber will 

 add appreciably to the amount of timber taken out. 

 Furthermore the pressure of an increasing demand, by 

 stimulating the rate of cut both at the big mills and 

 at numerous smaller mills, which will probably oper- 

 ate, as at present, in small patches of timber, will 

 very likely hasten the final exhaustion of the timber. 

 All things considered, it is doubtful if there will be 

 any appreciable amount of timber left in commercial 

 holdings in Wisconsin at the end of 20 years. Growth 

 does not enter into the computation at all, unless a 

 radical change is made in the direction of efficient 

 fire protection and the application of forestry. 



In upper Michigan the stand will last considerably 

 longer. Here 60 per cent as many mills operate in 

 twice the timber enough, in fact, to last 40 years 

 at the present rate of cutting for lumber only. Some 

 new operations are already contemplated, however, 

 and the cut for lumber and other products will doubt- 

 less increase within the next few years. One princi- 

 pal holder is reported to have estimated the life of 

 the stand at 25 or 30 years. 



Minnesota. Timber conditions in Minnesota differ 

 widely from those in "Wisconsin and Michigan. The 

 Wisconsin lumber cut for 1918 was 85 per cent hard- 

 woods and hemlock, while that of Minnesota was 91 

 per cent white pine (which includes also a consider- 

 able amount of Norway pine and other species in the 



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