40 Forestry Quarterly. 



cases be measured with a steel tape.* In measuring leaning trees the 

 hypsometer should be set for a horizontal distance measured from a point 

 directly under the top of the tree and a note should be made in the indi- 

 vidual tree records to that effect. 



NUMBERING. 



Nails. — Number 12, 6 d, copper nails should be used. They can be pur- 

 chased upon application to the District Forester.** 



The numbered metal tags are attached to the trees at four feet from 

 the ground, or 6 inches below the diameter measurement, with the copper 

 nail. On mature trees or those having a thick bark the nail should be 

 driven in its entire length but on small growth or where the bark is thin 

 they should be driven in to only about one-half inch from the head to allow 

 for the growth of the next five years. 



Tags. — The tags should always be placed on the same side of the trees 

 for a single plot. 



Both the common tin and zinc numbered tags have been tried in the field 

 and found unsatisfactory, the former rusting badly and the latter turning 

 white upon exposure to the air so that the numbers could hardly be read. 

 The galvanized iron tags are the most satisfactory. These can be obtained 

 upon application to the District Forester in accordance with the following 

 specifications : 



"Of first class galvanized iron, at least 16 gauge, rolled flat into discs of 

 one and three-quarters inches in diameter, consecutive numbers one-half 

 inch in height, from i to 5,000* to be deeply stamped on each tag one-half 

 inch from the base, a hole one-eighth inch in diameter to be punched at the 

 top of the tag at one-eighth inch from the outside edge ; all tags to be wired 

 with strong wire in bunches of one hnudred each, the bunches to be placed 

 in consecutive order in a strong box and to be securely packed with 

 excelsior or some other good packing material." 



INDIVIDUAL TREE RECORDS. 



Form 33^, Valuation Survey Book should be used in keeping the records 

 of the measurements of the trees on the plots. Each sheet should be 

 marked with the reproduction plot number, the Forest, the date, and the 

 serial page number. The following data are to be recorded : 



1. Consecutive tree number. 



2. Species. 



3. D. B. H. two measurements. 



4. Height in feet to base of crown. 



5. Height of tree in feet. 



6*. Volume in feet board measure or cubic feet. 



7. Health of tree. 



8. Description of the length, widtli, vigor and top of crown. 



9. Damage to the tree or crown by insects, fires, etc. 

 10. Seeding of tree at time of measurement. 



1. Use consecutive numbers on those Forests which are measured in 

 one season. No numbers over 5,000 should be used because of the large 

 space taken up by them in mapping and the making of tree records. 



2. The distinction between "yellow pine" with its light colored bark and 

 high form factor and "black jack" with its dark bark and lower form 

 factor should be used in these records. Where a tree has begun to form 



*By fastening a wooden handle on the loo foot steel band tape it has proved to 

 be the best for this wox-k. 



**Cost about 25 cents per pound. 

 *Cost $2.90 per M. in lots of 30 M. 

 *Computed in the office. 



