Find for the distance between points and elevation of each points and elevation difference from each points
Extracted text: The following observations were taken with an optical instrument fitted with an anallactic lens, with K = 10o. Instrument Height of Station of Vertical Instrument Staff Angle Staff Readings Remarks station -4°20' +6°30' 1.325, 1.825, 2.325 0.850, 1.600, 2.350 1.715, 2.315, 2.915 A 1.255 Elev of C = 255.750 m A 1.255 D B 1.450 D -7°24'