470 
SCOUTING FOR GIRLS 
A 
tower, to a point some distance from the tree, and plant 
a pole or stake say 5 feet high B ; continue pacing the 
straight line to the point where, lying down with eyes 
level with the tree base, the top of the tree can be seen 
on a line with the top of the pole ; plant here stake C. 
The height of the tree AA' wil be to the length of the 
distance from C to A as the height of the pole, BB' is to 
the distance between B and C. A Scout can stand in the 
There are other ways of determining height. As 
shown in diagram c, place a mirror (M) horizontally 
on the ground reflector side up, some distance from the 
base of the object to be measured, in this case a tent. 
Walk backward from the mirror in a straight line until 
the top of the tent pole can be seen in it. The problem 
will read in this way : the distance from the mirror to 
your heels (MS) is to the distance from your heels to 
your eyes (GS) as the distance from the mirror to the 
base of the object (MT) is to the height of the object 
TT'). Water in a dark pan or tray or a pool on a still 
day will answer for a mirror. 
