USE OF THE FOREST SERVICE STANDARD 



775 



ings can be taken from the same point by merely measuring the dis- 

 tance to each tree, greater speed in securing field data is possible than 

 where a new point must be chosen for each tree.* The relocation of a 

 point common to several trees is readily made in subsequent readings 

 if the distance and bearing to only two trees is known. 



The method described maty be considered objectionable on the score 

 that true height readings cannot be secured directly in the field with- 

 out considerable extra computation. To the writer this does not seem 

 necessary, however, especially where the acquisition of sample plot 



data is involved. Since tiie essential data are recorded in the field. 

 the computations for true height readings can be made in the office. 



In conclusion, a few remarks in regard to defects in the present type 

 of Forest Service Standard Hypsometer are presented, together with 

 suggestions for using the instrument in a manner which tends to offset 

 them. 



Since the graduations on the scale of the instrument represent 5-foot 

 intervals, it is difficult to read interpolations correctly to the nearest 



*The location of separate points for each tree from which to secure good 

 siphts (when only loo feet or multiples of same arc used) is especially difficult 

 in dense stands and results in much loss of time. 



