A level is set up and a reading of 2.815 m is taken on a bench mark the elevation of which is 92.145 m. At the beginning of the line to be profiled, the rod reading is 2.515 m.; 20 m from the beginning, it is 1.607 m; at 40 m, it is 0.722; at 56 m and 80 m, the rod readings are1.481 m and 0.792 m., respectively. On a rock that is not on line, the rod reading is 0.565 m. The level is then removed ahead, set up and a rod reading of 1.952 m is observe, the rod still being held on the rock. The readings along the profile are then resumed: 100 m from the beginning of the line, the rod reading is 1.159 m; 120 m from the beginning of the line rod reading is 1.534 m; fin

A level is set up and a reading of 2.815 m is taken on a bench mark the elevation of which is 92.145 m. At the beginning of the line to be profiled, the rod reading is 2.515 m.; 20 m from the beginning, it is 1.607 m; at 40 m, it is 0.722; at 56 m and 80 m, the rod readings are1.481 m and 0.792 m., respectively. On a rock that is not on line, the rod reading is 0.565 m. The level is then removed ahead, set up and a rod reading of 1.952 m is observe, the rod still being held on the rock. The readings along the profile are then resumed: 100 m from the beginning of the line, the rod reading is 1.159 m; 120 m from the beginning of the line rod reading is 1.534 m; finally, 160 m from the beginning of the line the rod reading is 2.196 m. From following description above make a complete form of profile level notes and compute the elevation at the point 100 m from the beginning of the line, the elevation of the turning point, and the difference in elevation of the beach mark and to the last station.