Davies, Charles, 1798-1876 · New York, Cincinnati [etc.] American book company · leaf 130
e rule conforms to this case. The statements of last paragraph are true, whatever thenumber of trapezoids in the series; even should the trapezoidadded compose, alone, the series. In consequence, since everypossible broken line is some succession of progressive, retro-gressive, and perpendicular… … Fig. 80. 124 ELEMENTS OF SURTEYiyG. [book III. Example.—Let it be required to determine the area of a tractof land whose description is as follows: Beginning at a poplar on the south bank of the Cumberlandriver; thence south 31 poles to a stone monument; thence east180 poles to a beech ; thence…
Surveying
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