To adjust a dumpy level by peg method of adjustment, two points A and B were
set up. With the instrument at point A, the rod reading at A was 1.623m and the
foresight at B was 2.875m. The level is transferred at B and the backsight at B was
1.622m while the rod reading at A was 0.362m.
a. Find the true elevation between A and B.
b. What is the error in the line of sight?
c. Determine the correct reading at A that will give the level line of sight
with the instrument still at point B.