Calendar: 1870-1871 Page 541

APPLIED SCIENCES 541 Find the base of an isosceles triangle whose sides bear respectively 20 and 20" and whose area is 200 acres Lay out 200 acres in rectangular form one side being twenty chains longer than the other What is meant by the variation of the compass Given the following magnetic bearings and variation required in each case tbe true bearing 48 1215 var 21$ Ν 5' 30 Ε var 12 1245 var 224 50 36 15 var 221 THIRD YEAH What is the difference between the level and Gravatts and how are they each adjusted for coll nation When are two points on the surface of the earth said to be on tbe same level Assuming the mean diameter of the earth to be 916 miles show that the effect of curvature at one mile distance is 004 inches and that the curvature varies as two-thirds in feet of the square of distance in miles How many cube yards in cutting whose heights are as follows Chains at 0-00 at 1020 at 24 00 at 30 00 at 40 00 Slopes to width of centre 30 feet feet ך 15 feet 30 feet 10 feet feet Taking final levels down steep slope with level slightlj out of adjustment what would you do to insure accuracy road is required to be constructed between two points in an undulating country it is to be as direct as possible and in no part to exceed given gradient 111 what manner would you first run trial sections for choice of routes