1. 3.593 m
2. 3.953 m
3. 4.495 m
4. 4. 594 m
4.495 m
1. 1, 2, 3 & 4
2. 2 only
3. 3 only
4. 1 & 4 only
2 only
1. 90.8
2. 100.8
3. 110.8
4. 120.8
100.8
1. 138.014 m
2. 139.616 m
3. 140.014 m
4. 141.616 m
140.014 m
1. Points on the longitudinal section
2. Points of equal elevation
3. Point of equal local ground slope
4. Points of transverse section surveys
Points of equal elevation
1. Depression
2. Hill
3. Cave
4. Well
Hill
1. Lesser
2. Greater
3. Equal
4. Either lesser or equal
Greater
1. 1, 2, 3 & 4
2. 1, 2 & 3 only
3. 1 & 4 only
4. 2, 3 & 4 only
1 & 4 only
1. Chlorides
2. Dissolved oxygen
3. Hardness
4. Residual chlorine
Hardness
1. A fixed point of known elevation
2. The last staff reading taken before shifting the instrument
3. The first staff reading taken after setting the instrument
4. Any staff reading taken on a point of unknown elevation
The first staff reading taken after setting the instrument