( 54 ) 

 Instructions for carrying out an Enumeration Survey of Harra Trees. 



I. 



II. 



A B 



C D 



The following diameter-classes will be adopted : 



Class A. Trees up to 6" in diameter. 

 B. from 6" to 12" in diameter. 

 >. c - >. ,, 12" to 18" 

 i> D. above 18" in diameter. 



The callipen used for gauging the diameter of the trees will hare the rule on 



which the movable arm slides divided into 6-inch 

 compartments, each compartment being painted a 

 different colour. The gaugemen will thus have only 

 to note and call out the colour of the compartment 

 intersected by the inner edge of the sliding arm, and any 

 illiterate man or boy who can recognise the principal 

 colours can be a gaugeman. 



III. The callipers will be applied at the height of the gaugeman's shoulders, and as 

 nearly as possible at right angles to the axis of the tree. If there is an excrescence or the 

 tree is forked at that height, the measurement will be taken immediately above the ex- 

 crescence or below the fork, as the case may be. 



IV. Every gaugeman will be furnished also with a light axe with a short haft, with 

 which he will blaze each tree immediately after he has called out the colour intersected on the 

 painted rule. This is to prevent one and the same tree being enumerated more than once. 



V. Each page of the recorder's note-book will be divided by three parallel lines into 

 four vertical columns, headed successively A, B, C and D, commencing from the left. The 

 record will be kept by means of groups of ten trees, each group consisting of two vertical 

 rows of four dots each joined by two diagonal lines, thus ;Xi ;'X; ;X; , and soon. Thus, 

 when the enumeration in any block has been completed, there will be no difficulty in totalling 

 up and noting down at its foot the number of trees recorded in each compartment of the page. 



VI. In the case of small forest blocks, the enumeration survey will be made by entire 

 blocks. If the block is large, the survey will be effected separately for large compartments 

 of the block formed by intersecting roads and important streams and ridges. A whole 

 page will be assigned to each separate survey and the name and number of the block 

 and, in the case of large blocks, also the boundaries of the compartment will be noted at 

 the top of the page. 



VII. The enumeration survey will be effected over successive strips just broad 

 enough to be completely covered by the line of gaugemen and efficiently overlooked by the 

 recorder. In the annexed diagram the black parallel lines show the strips and the red 

 line the march of the enumeration survey party. The strips need not be marked at all on 



the ground ; the regular march of the enumerating 

 party will be secured by the gaugemen keeping in line 

 and at the proper distances apart from each other and by 

 one man (not provided with a gauge, whom we will call 

 the boundary man) walking along the boundary of the 

 forest or compartment or along the edge of the last 

 strip surveyed, as the case may be, and thus serving as 

 guide to the rest of the party. Thanks to the blazes 

 made by the gaugemen (the blazes, to be readily seen, 

 should of course always be made on the trunks on the 

 side facing the area still remaining to be surveyed), 

 the boundary man will have no difficulty at all in fol- 

 lowing the outer edge of the strip last surveyed. 



VIII. The number of gaugemen should be large enough to keep the recorder fully 

 employed and will obviously depend on the abundance of harra trees in the crop. At the 

 same time they should not be so numerous as to spread out of sight and beyond the call 

 of the recorder, whose most convenient position will be immediately behind the middle 

 point of the line of gaugemen. 



IX. It is essential that the enumeration should be as accurate as possible, and hence 

 only your Working Plans Assistant and, in his occasional unavoidable absences, a trustworthy 

 upper subordinate should perform the duties of recorder. Whoever records must sign his 

 name at the foot of each record kept by him ; in no other way will it be possible to fir 

 responsibility, and unless we can fix responsibility, the work will be bound to be un- 

 satisfactory. 



E. E. FERNANDEZ, 



Offg. Conservator of Forests, Northern Circle, 



Central I'rovincts. 



