Volume liable for Lodgepole Pine. 321 



Length" is seldom entered as it is of no special importance since 

 Lodgepole pine is seldom capable of yielding clear lumber. 



Data for Sawlog-Tie-Prop Table. 



In securing measurements on trees cut into ties, the record 

 is modified so as to present the use of the data for both a sawlog- 

 prop table and a sawlog-tie-prop or simply tie-prop volume table 

 providing a column for "No. Ties" and a double set of "Totals." 



The bole of 11" to 15" trees to a point approximately 10" in 

 diameter, is usually cut wholly into ties, and above that point to 

 a 5" minimum diameter, into prop material. From trees 16" to 

 20" D. B. H., one or more sawlogs are butted off until tie dia- 

 meters are reached, when the remaining portion of the bole is 

 cut into ties' and prop material. 



In measuring trees cut wholly into ties and props, the figures 

 as mentioned above are so recorded as to furnish data for both 

 kinds of volume tables. Each tie is recorded as an 8.0' log, the 

 d. i. b. and d. o. b. determined as with logs and actually scaled, 

 gross and defect, and the log is also tallied as' one tie. Beyond 

 approximately 10", the point where props begin, the pieces down 

 to 6" are entered only as logs. From 6" to 5" the regular prop 

 is entered in the "Linear feet" column opposite "Top." Two lines 

 of totals are computed for all columns except "Length." The 

 upper line of totals furnishes data for the tie-prop table; the 

 lower line for sawlog-prop table. 



In measuring trees cut into logs, ties and props, the manner 

 of recording the data is simply a combination of that usual for logs 

 and that for ties and props. 



Although in this method of double recording a slight inac- 

 curacy occurs in that no overrun of length is allowed in the ties 

 and large props, nevertheless, this seldom makes a total dif- 

 ference of more than 1.5 feet in the total height of the tree and is 

 more than offset by the fact that data for two different tables 

 are combined in one set of measurements and recorded on a 

 single tally sheet. 



Deterviination of Site Qualities. 

 The simplest and probably the most accurate method of de- 

 termining the site qualities of stand is that of Bauer, who uses 



