Calendar: 1890-1891 Page 785

ENGINEERING DEPARTMENT cxxiii Make sketches and explain the use of the Box Sextant the Pentagraph the Eidograph Complete and check the following page of Level Book Back Inter Fore Rise Fall Height above Base Distance 32 ד ι 50ΌΟ 6-59 rti 1-50 84 3-70 1-42 β 4-40 9-53 6-54 6-80 7-89 8Ό0 9-42 ר 9Ό0 1352 10 00 In the above Field Book calculate the gradients between the points 0Ό0 and 440 also between 680 and 10-00 Describe how the "true" North is found Explain how Traverse Survey is carried out and closed Explain the sources of error in Levelling including Curvature Describe the Prismatic Compass and the Theodolite and give sketches 10 Plots of two Surveys previously prefaced