A treatise on surveying, comprising the theory and the practice ; (1887)
Gillespie, W. M. (William Mitchell), 1816-1868, Staley, Cady, 1840- [from old catalog] ed · New York, D. Appleton and company · leaf 47
le, and the angle ofits opening must not be again changed. Xow let a distance of580 links be required. Open the dividers till they reach from 58to 58 on the two legs, as in the dotted line in the figure, and itis the required distance. Again, suppose that a scale of 2-Jchains to 1 inch is desired.… … 51. Whatever scale may be adopted for platting the survey, itshould be drawn on the map, both for convenience of referenceand in order that the contraction and expansion caused by changesin the quantity of moisture in the atmosphere may affect the scaleand the map alike. When the drawing-paper has…
Surveying
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