A complete treatise on practical land-surveying, in seven parts; (1839)
Nesbit, A[nthony], 1778-1859. [from old catalog] · London, Longman, Orme, Browne, Green, and Longmans; [etc., etc.] · leaf 45
ur compasses, and apply it to theline of chords ; and it will show the number of degrees required. Note.—Angles may be more expeditiously laid down or measured bymeans of a semi-circle of brass called a Protractor, the arc of which isdivided into 180 degrees. c 4 24 LAND-SURVEYING. Part I. PROBLEM… … Draw the meridian Ene A N ; and with the sweep 11in your compasses, taken from the line of chords, and A as acentre, descrihe the arc B C. Set off the given angle 45°, from B :: C : draw the line AC^and it will range X. E. Aafe.—If the Hue had ranged >. W, the angle must have bees set off onthe…
Surveying
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