Elements of surveying and navigation : with a description of the instruments and the necessary tables (1847)
Davies, Charles, 1798-1876 · New York : A.S. Barnes & Co. · leaf 108
ance of the preceding course, plus itsdeparture, plus the departure of the course itself Remark. It should be recollected that plus is here usedin its algebraic sense, and that when double the meridiandistance of a course and the departure which is to be addedto it, are of different names, that is,… … Demonstration of the Rule. Let the figure JIB CD, which we i^have aheady surveyed with the com-pass, be resumed. By inspectingthe field notes, it will be seen thatB, or station 2, is the most westerlystation. Through this point let theassumed meridian NS be supposedto pass. Then, B will be the…
Surveying · Navigation
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