19 



men can at once recognise np to what point the etiip just com- 

 pleted extends. 



The duty of the sarreyor in charge of the party is to see that 

 the callipers are properly applied, the diameters or girths read 

 before the callipers are removed, and the blaze made on the correct 

 side . When a division into height-classes is necessary, the surveyor 

 has also to jndge with his eye the height-class of each tree as it 

 is ganged. Hence the advisability of investing one and the same 

 person with the daties of both surveyor and recorder. 



The following is a sample of a convenient form of field-book — 



HaXGE __ - COHPABIKEHT.. 



BlACK - - -. 



As the girth of each tree is called, a stroke is made in one of the 

 compartments opposite the figore expressing that girth. The first 

 four strokes are driawn npright, the fifth one obliquely across 

 them. Each group of strokes thus represents five trees of the 



b2 



