12 PRELIMINARY MEASUREMENTS 



procedure be varied as to the list of the measurements taken, the 

 organization of the work, and the accuracy required? 



2. How woukl you proceed if you were to collect data in a tie operation 



for the construction of a tie table? 



3. Give the method of procedure, measurements necessary, etc., for col- 



lecting data for a cordwood table. 



4. In the collection of volume table data, why are broken or defective 



sections of a tree scaled as if sound? 



5. Why are the measurements for a general table usually taken in regular 



length sections {i.e. 16.2), rather than in the same lengths as cut by 

 the logger? 



6. Explain the difference between fixed, merchantable, and used limits for 



the top diameters of trees measured . 



7. How would the organization of the work in a full stem volume study 



be changed if there were only two men in the party? 



8. What is the object of taking the clear length, and when should it be 



omitted? 



PROBLEM 7. (Field) The Collection of Data for Growth Studies. 



Explanation. — The illustration given below aims to include all measurements 

 required in any growth study concerning itself with the stem of the tree 

 (hence it does not include branches), and unless a specific problem involves a 

 full stem analysis all of the measurements enumerated below may not be 

 required. As in Problem 6, the student should realize that the first important 

 step in the collection of data for any specific problem will be to determine 

 just what measurements are required. 



Illustration. — To make a Complete Stem Analysis, 



Directions. 



A. Parties. — The organization of men into parties will be the same as for 



Problem 6, except that the taking of the D.B.H. and the D.I.B. 

 measurements of each section will be added to the duties of the pole- 

 man; and the caliperman now becomes the ring counter. The duties 

 of the latter will be to count the rings at each cut, to make the decade 

 measurements, and to obtain the thickness of bark. 



B. Equipment Required for Each Parti/. — Same as for Problem 6, with the 



addition of a small hand magnifying glass to aid in counting the annual 

 rings and an analysis or similar rule graduated into inches and twen- 

 tieths. If the trees are more than 2 1 inch(>s in diameter inside the bark 

 at the stump, the analysis rule should be 24 inches long. It will also 

 be found a great aid to the work if this is sui)plied with a centering point 

 attached at the zero mark . 



