adjusted | 3 (of the quantity 386°75) is added to the readings so long as lems on the field in surveying and leveling; horizontal and as follows: The staff has to be placed over the fixed point | the hights exceed 300 feet. vertical points being fixed at one observation, In ascertaining the… … ment, and which is formed of a steel plate. ordinary manner. The arrangement is such If P, Fig. 1, represents the point of which as has been already described, that any desired scales can be employed, the conditions regulating the em- the staff is placed vertically over this point. ployment of…
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