Bul. 820, U. S. Dept. of Agriculture. PLATE XI. 
F—32823A 
FIG. |.—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 IO INCHES 
(AVERAGE 6) IN DIAMETER AT TOP END. SIXTEEN HUNDRED LOGS WERE 
ESTIMATED TO CuT 209,000 FEET, OR 80 Loacs PER 1,000 FEET. Loas CUT 
MOSTLY INTO 2 BY 4 AND INCH BOARDS. 
ii. 
— 
er ee 
— 
Seeing as 
ey Se 
F—328I7TA 
FIG. 2.—FORTY-YEAR-OLD STAND AFTER CLEAR CUT FOR PULPWOOD. SHOWS 
TREES TOO SMALL FOR PROFITABLE PULPWOOD CUTTING LEFT STANDING, 
BIUT MOST OF WHICH WILL PROBABLY BE WIND-THROWN LATER ON. 
Danger of fire here is great on account of the unpiled and unburned slash. 
LUMBERING OF DENSE, EVEN-AGED, JACK PINE STANDS. 
