52 



DETERMINATION OF THE CONTENTS OF STANDS 



is constructed with a diffcront classification of heights than that given hero, the 

 same height classes used in the table should be usetl in cruising. The dot system 

 of tallying described in the previous exercise should be used. Each of the species 

 will be talhed separately in one of the three sets of columns provided on the tally 

 sheets. Should more than three species be found on the area to be cruised the 

 three species found in greatest number should be tallied in the columns provided 

 and other species tallied at the bottom of the sheet by name and size, i.e., a white 

 pine 35 inches D.B.H. 125 feet high would be tallied W. P. -35 -125, or if it had 

 10 per cent defect, W. P. -35 -125 -10 per cent. 



Deductions for all defects which would affect the amount of lumber which 

 can be cut from the tree, will be made exactly as outhned in Problem 23, except 

 that the diameters of swollen-butted cedars need not be reduced unless thesweUing 

 is excessive. 



Part II. Office Computations 



After completing the field work the next step is to compute the contents in 

 board feet of each species on each tally sheet. If a considerable amount of this 

 kind of work has to be done a multiplication volume table should be made. 

 This is made by expanding the volume table so that it will show for each different 

 D.B.H. and height class the volumes of trees from one to ten in number. For 

 example, Volume Table Number V in the Appendix if converted into a multipli- 

 cation volume table would have the following form : 



D.B.H. 



10 



12 



Etc. 



Etc. 



With such a table the volume of any number of trees up to ten may be read 

 off at a glance or the volume of any other number of trees secured by a short 

 computation and the work will be much hastened; i.e., the volume of 13 trees 

 would be the sum of the volume of 10 trees and 3 trees. 



Using the multij^lication volume table one man should call off the number of 

 trees in each D.B.H. -height class of a certain species to the other man of his 

 party who will immediately give him their volume as read from the table. The 

 first man will enter this volume on the tally sheet and total for each species, or 

 better still will enter the volumes, as called out, in an adding machine and secure 

 the total with the machine. The totals for each species should be entered at the 

 foot of the proper column and sliould be kept separate for the sound live trees, the 

 defective live trees, and the sound and defective dead trees. In the case of the 

 defective trees the totals should have defect properly discoimted. 



