Calendar: 1874-1875 Page 578

578 APPLIED SCIENCES VIII -j&urbtmng anb uLtbcIling THIRD YEAR Describe the ordinary kinds of levels with their adjust- ments and the usual method of levelling them in the field Describe the method of levelling with the theodolite when is it applicable and what corrections are necessary Given points and respectively situated from the position of the instrument and miles the apparent height at each point reads 100 feet Required the true heights If your level is thoroughly out of order what must you do to insure accuracy in your work How many cube yards are there in cutting whose heights and distances measure as follows Wiath of centre 30 feet slopes to Chains Feet 24 14 32 22 18 40 12 50 Note -Bidder's tables may be here used Calculate the gradients in the following cases At Chains Feet 200 434 120 196 275 410 350 204 572 90 1000 Note-The form the answers to this question should take is thus Inclination in so many