iiiiil_ | Sight and holdthis levelwith a vertical tree... |
|
|
| or a corner of a building... | ||
|
|
| |
| l | _ | or a fence post |
| |||
|
|
|
l | I |
| |
|
a 15o
Ob
i
I,LI
I,LI
Q.
15°
Z
I,LI
iiiiil_ | Sight and holdthis levelwith a vertical tree... |
|
|
| or a corner of a building... | ||
|
|
| |
| l | _ | or a fence post |
| |||
|
|
|
l | I |
| |
|
Ob
i
I,LI
I,LI
Q.
15°
Z
I,LI