528 



Journal of Agriculture, Victoria. [11 Sept., 1916. 



may be arranged similarly. The pegs (&) to (a) being on the level 

 are fixed in the usual manner. 



Should the depression be too deep to permit of the plumb line 

 being held to the marks on the wire, it may be stretched on the surface 

 to describe a straight line. A 20-ft. measuring rod may be placed 

 against peg (/) and plumbed at {g) as shown. 



Plate 12, Fig. 2, is section showing elevation and illustrating 

 simple method of pegging out the land under these conditions. All 

 ihe level land around the elevated portion is first pegged out in the 



Plate 13. — Using the diagonal line as a check on the right angle. 



ordinary way (d c) and (&) to (a), &c. When this is completed, 

 two Drdinary wires are drawn across each other, at right angles on 

 the elevation and from corresponding pegs at each end of the wires. 

 Where they cross each other marks the position of the pegs. Or the 

 elevation may be pegged out as shown (g, f, c, Fig. 1). 



Positions of Tkees found. 



The rows of small circles in Plate 13' indicate the positions of 100 

 trees. The method of finding those positions is illustrated in Plates 9 



