2n _::culap. sss. tr.s. depaetzviexi of AGKtCuizrtJBl 



the :" •-:::■" n of the tree number or may be separately marked. If 

 ttted numbers cann tl put n h at sm thing the bark they 

 sh old not be placed at the point of measurement. If the tree is 

 tagged the nail may be driven at the diameter point, and the diameter 

 tape allowed to rest on the nail while the measurement is being 

 taken. If nails earn: : )e used without creating danger of a swell- 

 ing that would distort the diameter measurement or a flow of 

 pitch that would run down across the j int f diameter measure- 

 it an I - gum fch tape, the tag may be hung so that its lower 

 just inisses the point of measurement or may be placed at a 

 measured distance above or below this point. In any use, the field 

 notes should be sj jcifi i s i the exact point at which the measure- 

 ment is made. 



If the diameter-measurement point is not exactly indicated by the 

 ; sita d : fch tag, it should be marked with a painted spot, small 

 cross, or horizontal line. Obviously, the bark at this point should 

 not be disturbed. A narrow h ::::■ ntal line about 6 inches i ng 

 nted over the bark ridges and well into the crevices - rves admir- 

 ably. Some part of this line will survive bark sloughing and tire or 

 other injury that would obliterate a mere sj t f aint. In paint- 

 ing such lines th | aint gun described on page 26 should give excel- 

 lent results. 



If calipers are to be used for diameter measurement two readings 

 will be mad- h tree, at right angles to each other, and the two 



points where th Jiper beam will hit the tree should be marked. 



ORIENTATION 0? TREE MARKINGS 



Proper orientation of numbers and breast -height marks on t: 

 may depend on several factors. Paint may fa 1 m re rapidly on th 

 south side than on a more sha le I si le f a tree, but may be quickly 

 covered with 1 ichens on the north side. Ordinarily, the most impor- 

 tant nsi Lerati >n in numbering trees is ease in relocating the num- 

 bers consecutively, mean- toward which are liscussed in the section 

 Procedure in Numbering Trees. 



NUMBERING REPRODUCTION 



Reproduction m re than 1.5 ii hes in breast-height diameter often 

 can support individually numbered tags affixed with nails, and in 

 - me instau : - : su] rt ainted numbers. For the most part. 

 however, individuals less than 3.6 inches in diameter can be identi- 

 fied more easily if marked with tags attached by wire either to the 

 stem or to a bran:::. Seedlings less than IS inches in height should 

 be marked with tags fastened in the I ps of wire pins. Very small 

 unnumbered seedlings can be marked by pins, without tags, or by 

 plant stakes, placed in the ground close beside them. Seedlings 

 marked with stakes are shown in plate 6. A. Seedlings differing in 

 year of origin may be denoted by pins differing in color or shape. 



Tag- on seedlings are often difficult to locate. Hence the alumi- 

 num-tape tags desci the foregoing (p. 24) are preferable to 

 other kind- for this use because of their brightness and their resist- 

 ance to tarnish, despite the fact that when at:: he 1 i seedlings they 

 are - metxmes so chewed by small animals that the figures are ren- 

 dered illegible. The.-e taL r s can be attached to the tree- bv means of 



