16 
MEASURING 
INACCESSIBLE DISTANCES 
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One of the simplest methods of measuring the 
distance between two points when an obstacle 
prevents a tape-line being stretched between is as 
follows :— To measure from A to B, put in a stake 
at C, so that the lines CA and CB clear the Obstacle. 
Measure from C to A, then swing round the tape- 
line and get a point E in line with C and À, and 
A 
` 
` 
` 
OBSTACLE 
` 
with the distance CE equal to CA. In a similar 
way, get the point D in line with C and B, and 
with {һе distance CD equal to CA. The length 
from D to E will be equal to the length from A to B. 
