COLLECTION OF DATA FOR VOLUME STUDIES 9 



tree from the stuinp-cut (or from a fixed height above the ground should 

 the measurement of the log sections not be started from the stump) up to 

 the top diameter limit does-not contain an even number of regular sections, 

 the last section and the fractional section will be broken into two even-foot 

 lengths of as nearly equal length as possible. Example: In measuring to 

 an 8-inch top diameter limit with 16.2-foot sections, suppose there results a 

 section at the top 10.2 feet long. Instead of taking the last two sections in 

 these lengths, they should be broken into a 14.2-foot length and a 12.2-foot 

 length with the short length at the top and the D.O.B. measurements 

 taken at the top ends of these sections. 



Care must be used in selecting the trees for measurement in order that 

 a range of sizes may be obtained and in order that only normal specimens are 

 . included. Abnormal trees or trees with any kind of malformation should 

 not be measured. However, trees which are broken or are defective, as 

 long as the defect does not affect their shape, may be taken, but they should 

 be measured as entirely sound with no attention given to the defect. 



Illustratiox. — To Collect Data for a General Full Stem Volume Study. 



Directions: 



A. Parties. — The following organization of the men into 3-men parties, 



with the duties of each as indicated, will be found efficient: 1. The 

 Notekeeper, who is chief of party, is responsible for all work, and tallies 

 all measurements called out to him. 2. The Caliperman measures the 

 D.B.H. and all other diameters outside of bark with the calipers, and 

 the average width of bark with the analysis rule. 3. The Poleman 

 locates the D.B.H. and measures the length of all sections including 

 the stump and tip, and the clear length. 



B. Equipment Required for Each Party. 

 1 pair tree calipers. 



1 six-inch flat boxwood or metal rule graduated into inches and tenths. 

 1 8-foot pole, graduated into feet and tenths, and with the D.B.H. point 



(4.5 feet) plainly indicated. 

 1 piece carpenter's crayon. 

 1 belt axe. 

 1 field notebook supplied with Form 2A. 



C. Summary of Measurements Required. 



Measurements Unit Instrument 



1. Stump height Foot to nearest 0.1 ft. 8-foot pole 



2. Stump diam. outside bark (D.O.B.) Inch to nearest 0.1 in. Tree calipers 



3. Width of bark on stump Inch to nearest 0.1 in. Boxwood rule 



4. D.B.H. outside bark Inch to nearest 0.1 in. Calipers 



5. Length each section and tip Foot to nearest 0.1 ft. 8-foot pole 



6. D.O.B. end of each section Inch to nearest 0.1 in. Calipers 



7. Width bark end each .section Inch to nearest 0.1 in. Boxwood rule 



8. D.I.B. end of each section Inch to nearest 0.1 in. (Calculated by 



notekeeper) 



9. D.O.B. at middle of total height Inch to nearest 0.1 in. Calipers 



