122 A MANUAL FOR NORTHERN WOODSMEN 
furnished by a large timber tract are its streams. On 
these transit and stadia furnish the most efficient means 
of survey. If roads are available, the same method may 
be employed, or another may be substituted. 
Surveyed bounds with chainage marks_ h -h- 
Road surveyed by stadia, reference points 
fixed by stadia and by level_ - — o ry- 
Strip surveys with barometer.... 
On the tract used in illustration, the road, rather than 
the stream, was used for the subdivision. The different 
steps in the process of survey were as follows: 
1. Outside boundaries run with compass and chain. 
Chainage marks for reference left every quarter mile. 
2. Road across the tract surveyed by transit and stadia, 
using the needle and setting up the instrument at alternate 
stations. Points marked at short intervals. See notes on 
page 86. 
3. Level line run along road, giving elevation of points 
established in the stadia traverse. 
4. Strip surveys run between the road and the boundary 
