38 Implements. 



ten feet from the corner of the building. The compass 

 being adjusted the needle points as usual due north, we 

 fix the needle with the capstan pinion and set the arms of 

 the compass to 60°, stake out the line, and measure the 

 distance, 18' 6" to a, where a stake is driven in, and so on 

 until the curve is fully marked. Any object may be located 

 in the same manner, such as shrubs and trees, flower-beds, 

 the outlines of hills and rockeries, and so forth. 



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3 



FIQ. 11. -HOW TO STAKE OUT A WALK BY MEANS OF COMPASS. 



A staff -head is an octagonal prism of brass with a 

 socket for the Jacob's staff. Each side has a narrow longi- 

 tudinal opening by means of which angles of 45° and 90° 

 can be staked out on the ground ; the staff with the instru- 

 ment being placed vertically on the spot where the lines are 

 to cross, stakes are placed exactly in the same manner as 

 by means of the compass. The flagstaffs are simply square 

 or octagonal strips of wood, six or eight feet long and 



