Calendar: 1875-1876 Page 606

602 engineering and applied sciences Γ Also when inclined at the same angle to both planes of projection Show by its traces plane in each of the following positions When inclined at 35 to and perpendicular to When inclined at 35 to and perpendicular to When inclined at 35" to both When its traces are both parallel to xy show by construe- tion the inclination of the plane 10 Show in plan and elevation" hollow hexagonal prism 4" in length when one face is inclined to at 45 The material of which it is supposed to be made is j" thick and each edge of the outer hexagon is 1"5 long VII urbcjHiig anii EcbcIItng 1THIRD YEAR When would it be advisable to use the theodolite for levelling Describe the errors of parallax curvature and refrac- tion and their corrections with formulae The following heights of an embankment above the level of the rails were as follows Chains Heights At 000 feet 3-00 η 11-00 29 וו 18-50 16 tt 26-20 36 48-00 28 60-00 38 Slopes to and width of centre 24 feet required the num- ber of cubic yards Required the rates of inclination of the following heights and distances