Bui. 820, U. S. Dept. of Agriculture. 



Plate XI. 



Fig. I. — Portable Mill Operation in a 30 to 40 Year Old Jack Pine 

 Stand. Logs Mostly from 8 to 10 Feet Long by from 4 to 10 Inches 

 (Average 6) in Diameter at Top End. Sixteen Hundred Logs were 

 Estimated to Cut 23,000 Feet, or 80 Logs per 1,000 Feet. Logs Cut 

 Mostly into 2 by 4 and Inch Boards. 



Fig. 2. — Forty-Year-Old Stand After Clear Cut for Pulpwood. Shows 

 Trees too Small for Profitable Pulpwood Cutting Left Standing, 

 BUT Most of Which Will Probably be Wind-Thrown Later on. 



Danger of fire here is great on account of the unpiled and unbumed slash. 

 LUMBERING OF DENSE, EVEN-AGED. JACK PINE STANDS. 



