5. Diameter tape. (Drag tape reconmended. ) 



6. Scale rule. (Calipers are occasionally valuable when log ends 

 are not exposed. ) 



7. Abney level for checking tree heights. 



8. Volume tables (preferably tables made up for inch dianeter classes 

 and one-half log heights.) 



9. Copies of this publication for reference, 



10. A fe;v pages of randon numbers for office and field use. 



Selection of training area 



The area chosen for training in sample tree measurement should be a 

 timber sale on vjhich cut trees are to be Fiarked and preferably vjhere 

 log scaling is contemplated. The trees marked in conjunction v;ith 

 the training can therefore apply to the timber sale and the measure- 

 ment can be incidental. A sale involving tvjo or more species should 

 be chosen in order to give a good representation of the job on typical 

 timber sales. For the check scale phase of the job, a sale on rhich 

 cutting is in progress should be chosen. Felled, bucked trees are 

 needed for training in check scaling. In this phase of the training 

 emphasis should be placed on getting a representative check scale, 

 that is, a sample of measured trees well distributed over the sale 

 area as well as over the range of tree sizes. 



Job breakdovm 



The follovring steps and key points for sample tree measurement are 

 based on training by the job-breakdown method which is being used 

 in many other phases of Forest Service work. Other jobs closely 

 associated vjith sample tree measurement, such as timber marking and 

 log scaling have also been described by this method of training. 



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