. 
140 THE WOODSMAN S HANDBOOK. 
the tree, and subtract the last result from the first, which gives 
the true height of the tree. Cost about $10. (See fig. 10. ) 
A cheaper form of this instrument has a wooden frame and slide, 
and scales printed upon strips of paper pasted upon the frame. 

Fic. 10.—Manner of using Faustmann’s height measure. 
Clinometer for Measuring Heights. 
This instrument, shown in fig. 11, consists of a square panel of 
wood recessed to receive a metal disk and a glass which protects 
it. The disk has a curved right-hand scale and a curved left-hand 
scale engraved upon it below its center. These scales meet each 
other at a zero point, and correspond to each other in their grad- 
uations, which run outward in opposite directions from the zero 
point to 100. The graduations of these scales represent percent- 
ages of angles instead of degrees of angles, as do the graduations 
of most clinometers. These two scales are swept by a pendulum 
ball, the lower half of which is beveled and brought to an edge 
having a central index mark. The pendulum rod is formed at its 
upper end with an eye receiving a movable screw stud passing 
through the disk and panel and terminating at its rear end in a 
