53 



Where trees of different species are separately recorded, 

 the shapes as well as the colour of the labels may vary. 



Thus species A may be marked with square tickets, 

 species B with triangular tickets, species with round 

 tickets ; and so on. 



In taking measurements with the callipers, the foUowing^ 

 rules should be carefully observed in order to ensure the 

 greatest possible accuracy : — 



(1) Moss, creepers, etc., thick enough to vitiate the 



measurement of the stem must be removed before 

 measurement. 



(2) In the case of an abnormal swelling or indenture, 



the measurement must be taken above or below it 

 or both, and the average taken. 



(3) In the case of stems of elliptical or oval shape, two 



diameters at right angles to each otlier must be 

 measured and the mean taken. 



(4) The height fixed for the measurement should be 



adhered to, and on hill-sides this height should be 

 taken on the upper side of the stem. 



Meflsarements are usually taken at breast height. This height has been assumed 

 to he 4| feet : but as the boles of tref s do not tuper either regularly or very rapidly, 

 it IE not necessary that this leight should be exactly measured before the callipers 

 are applied. Sufficient accurary is attained if the measurer is careful to hold the- 

 cnllipers horizontally at the height of bis chest, and if the diameter is measured at any 

 height between 4 and 6 feet, and at a place where the stem is free from excrescences 

 and branches. 



(5) Where a tree divides into two or three main stems 



below the fixed height of measurement, each stem 

 must be measured and recorded separately. 



(6) The calliper must be placed at right angles to the 



axis of the stem, and the rule must touch the tree. 



(7) The reading must be taken while the calliper rests 



on the tree, and not after it has been, withdi-awn. 



In carrying out the enumeration of the trees, the 

 gaugemen advance in line and measure each tree at breast 

 height from the ground. After a tree is measured the 

 gaugeman calls out its native name, its diameter or girth 

 class, or the colour denoting this, and, in the case of the 

 highest, classes, whether it is sound or unsound. The 

 recorder then makes the necessary entry in his book, a form 

 of which is given below. 



Where the enumeration is to be complete, the record 

 should be prepared separately for each compartment or 



