- 30 - 
110 PLOW FOR TRACTOR MOUNT, ONE ROTARY PLOW, AND NUMEROUS LIGHTER 
PLOWS, TPUCK AND TRACTOR. FIGURE 13 IS A FRONT VIEW OF THE MAJOR 
PULL PLOW OPERATEC BY THE COUNTY. THIS PLOW IS BUILT SOMEWHAT ON 
THE SAME PRINCIPLE AS THE ONE SHOWN BY FIGURE 12, AND IS ALSO SUP- 
PORTED ON RUNNERS. THE DEVICE CARRIES A SMALL 1V" PLOW IN FRONT 
ABOUT 24 INCHES BY 6 FEET AND BACK OF THIS EAR-SHAPED WINGS ARE 
ATTACHED ON .OTH SIDES, AND BEHIND THESE ARE LARGE, ADJUSTABLE 
WING WIDENERS. THESE LARGER WINGS ARE ABOUT 7 FEET HIGH BY 8 FEET 
WIDE, AND WHEN OPEN WILL CLEAR A PASSAGE 30 FEET WIDE.  FIGURE I 
SHOWS A ROADWAY CLEARED SY THIS PLOW, SUT NOT QUITE TO THE MAXIMUM 
WIDTH OF 30 FEET. THE PLOW IS HAULED BY TWO TRACTORS AND CAN 
TRAVEL AT THE RATE OF APPROXIMATELY FIVE MILES PER HOUR. THE OUT- 
FIT CARRIES A CABIN FOR NECESSARY SMALL TOOLS AND ALSO A STEEL 
 
ITH AN EXTRA SUPPLY OF GASOLINE. THE HEAVY TYPE, TRACTOR 
DISPLACEMENT PLOW OPERATED BY MARQUETTE COUNTY IS SHOWN 
E 2. 
HERE ARE AT LEAST TWO TYPES OF ROTARY PLOWS IN USE; THE 
TYPE WITH THE ROTORS REVOLVING IN A PLANE PARALLEL WITH 
OF TRAVEL, AND THE FRONT TYPE WITH THE ROTORS REVOLVING 
NE PERPENDICULAR TO THE AXIS OF THE PLOW. THE LATERAL TYPE 
LY MOUNTED ON A 10-TON TRACTOR, WITH THE ROTORS REVOLVED 
TRANSMITTED FROM THE TRACTOR ENGINE AND SEPARATE CONTROLS 
ROTOR. THE PLOW IS ADAPTED BOTH FOR WIDENING WORK AND 
IMINARY OPENING OF CUTS. 
 
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