Van Nostrand's eclectic engineering magazine (1869)
[New York : D. Van Nostrand] · leaf 21
ured in ten working days pose that we have the river BCDE, of with a total probable error of less than which it is required to map the shore line. one-tenth of an inch; and the correct- At any convenient point, as A, we place ness of the supposed error has frequently upon the ground a plain… … and on this sheet a point A is marked so paper has the same direction as the real as to be directly over the point A on the line upon the ground. In the same way ground. Next, lay on the table a ruler, direct the ruler to each point in succes- one end being placed against the point sion the…
Engineering
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