Elements of surveying and levelling; with descriptions of the instruments and the necessary tables (1870)
Davies, Charles, 1798-1876 · New York and Chicago, A. S. Barnes & Company · leaf 30
o take off the distance 2.34, we place onefoot of the dividers at Z, and extend the other to e: and totake off the distance 2.58, we place one foot of the dividersat ]) and extend the other to q, XoTE 1.—If a line is so long that the whole of it cannotbe taken from the scale, it must be divided,… … 27. If, with auy radius, as AC^ we describe the quadrantCD, and then divide it into 90 equal parts, each part is calleda degree. If through C, and each point of division, a chord be drawn,and the lengths of these chords be accurately laid off on a 28 ELEMENTS OF SURVEYING. [book I. scale; such a…
Surveying
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