1(1 A MANUAL FOR NORTHERN WOODSMEN 



as x. Set up at 6 and, turning off a right angle, set a 

 stake r in the range a x. Then ab = bc. 



5. Method by 26 34' Angle. (B) Proceed as before, 

 making the angle b a c = 26 34' ; then a 6 = 2 6 c, as 

 may be found in the table of tangents. 



4. Method by 30 Angle. (C) 

 With compass at a set a stake 

 in line at b, and, turning off an 

 angle of 60, set another stake 

 on that range, as x. Set up 

 at 6 and turn off a b c = 30, 

 setting a stake c in the range 

 a x. Then a b = 2 a c. 



6. Method by Tangents. (D) With the compass at a 

 set a stake at 6, also run out a perpendicular line and set 

 a stake at c visible from b at any convenient distance. 

 Measure a c. With the compass at 6, take the bearing of 

 c 6 and thus get the angle a b c. In the table of tangents 



(I (* 



look up the tangent of this angle. Then ab 



FIG. C 



FIG. D 



FIG. E 



6. Method by Oblique Triangle. (E) The stake c may 

 be set at any convenient point visible from both a and b 

 and the angles at a and b measured. Measure also the side 

 o c or 6 c, whichever is easier. Then a b may be computed 

 as the side of an oblique triangle. For formulas neces- 

 sary, see pages 212-213. 



7. Method by Traverse. (F) In the case of a large lake 

 or stream, several courses may be run along its banks, and 

 when the range of the line is again struck, as at e, the dis- 



