∑B.S. – ∑F.S. = Last R.L. – First R.L. = ∑Rise – ∑Fall A(B.S.) = 1.250 -> B(F.S.) = 2.250 There is a fall from A to B Difference in R.L. = Difference in staff reading Note: There is no entry in the first row of rise and fall column. Amount of fall = Following staff reading – Preceeding staff reading Rise = B.S. – F.S. R.L. = R.L.(previous) – Fall R.L. = R.L.(Previous) + Rise (Previous) I.S. – I.S. = Rise/Fall H.I. = R.L. + B.S. (Previous) H.I. = R.L. + I.S. I.S. – Fall = B.S. Collimation plane ...
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