A treatise on surveying and navigation: uniting the theoretical, practical, and educational features of these subjects (1857)
Robinson, Horatio N[elson], 1806-1867. [from old catalog] · Cincinnati, J. Ernst; Toledo, Anderson, Burr, & co. · leaf 14
angeof base, or change of the unit. To transfer distances from the scale (as I e, p q, &c.) to paper,we require INTRODUCTION. 11 D IVI DEES. Dividers are nothing more than a delicate pair of compasses —two bars turning on a joint. They are too well known to requirerepresentation by a figure.… … The degrees are numbered both ways, from A to B and from Bto A. There is a small notch in the middle of AB, to indicate thecenter. To lay off an angle. Place the diameter AB on the line, so thatthe center shall fall on the angular point. Then at the degree required, at the edge of the semicircle…
Surveying · Navigation
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