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 41
minutes; and each minute into 60 equal parts,called seconds. Degrees, minutes, and seconds, are denoted bythe symbols °, , . Thus, the expression T 22 33, is read,7 degrees, 22 minutes, and 33 seconds. A quadrant contains 324,000 seconds, and an arc of 7° 22 33contains 26,553 seconds; and any arc… … 49. The siq)j>Iej7ient of au arc is whatremains after subtracting the arc from180^ Thus, GJ^ is the supplement ofthe arc ABF. 50. The si7ie of an arc is the per-pendicular let fall from one extremity ofthe arc on the diameter which passesthrough the other extremity. Thus, JBDis the sine of the…
Surveying
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