Davies, Charles, 1798-1876 · New York, Cincinnati [etc.] American book company · leaf 49
to G. 66. An Angle of Depression is a vertical angle havingone of its sides horizontal and the other oblique, the oblique sidebeing heloiu the horizontal side. Thus, DC A (Fig. 24) is theangle of depression from C to A. 67. An Oblique Angle is an angle the plane of whosesides is inclined to a… … Fig. 25. The measure in general use for land surveying is a chain offour rods, or sixty-six feet in length, called Gunters chain(Fig. 25), from the name of the inventor. It is composed of 100links, each joined to the other by two or three rings. Every tenthlink from either end, is marked by a small…
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