A Manual for Practical Surveyors: Containing Methods Indispensably Necessary for Actual Field Operations |
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Page 5
... of surveying , excepting perhaps so far as may have been requisite for the information of the classes under their direction . I have conversed with many persons who have been extensively engaged in land sur- veying , and PREFACE. ...
... of surveying , excepting perhaps so far as may have been requisite for the information of the classes under their direction . I have conversed with many persons who have been extensively engaged in land sur- veying , and PREFACE. ...
Page 6
... land sur- veying , and I have not in a single instance met with any one who has not expressed his unqualified conviction of the want of a work adapted to the purposes of the practical surveyor . Within a few years there have been ...
... land sur- veying , and I have not in a single instance met with any one who has not expressed his unqualified conviction of the want of a work adapted to the purposes of the practical surveyor . Within a few years there have been ...
Page 11
... lands . To examine the divisions of the limb of the in- strument , set the needle to any degree ; if both ends coincide with the corresponding divisions on the opposite limbs of the compass , it shows the adjustment is correct on that ...
... lands . To examine the divisions of the limb of the in- strument , set the needle to any degree ; if both ends coincide with the corresponding divisions on the opposite limbs of the compass , it shows the adjustment is correct on that ...
Page 18
... lands , or when great accu- racy is desired , a theodolite or transit should be used . A description of the former is deemed un- necessary , as this has been given in some of our best treatises on surveying , and also in " Simms ...
... lands , or when great accu- racy is desired , a theodolite or transit should be used . A description of the former is deemed un- necessary , as this has been given in some of our best treatises on surveying , and also in " Simms ...
Page 21
... LAND MARKS . Judge Wilson gave his decision in regard to lines and land marks , as follows : The best evidence is , 1st . Living marks , such as trees , & c . , the first and most substantial land marks ; and if marked trees should not ...
... LAND MARKS . Judge Wilson gave his decision in regard to lines and land marks , as follows : The best evidence is , 1st . Living marks , such as trees , & c . , the first and most substantial land marks ; and if marked trees should not ...
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Common terms and phrases
40 perches A E produced angles of deflection angular point back sight bearing of A B bring the sights bring the telescope centre pin circumferenter clamp the lower closing line correction course degrees difference of variation distance A C equal F B G feet Given A B internal angles kerfs last station let the needle line A B line C D line joining lines of survey lower plate magnetic magnetic bearings marked tree n¹ m¹ n³ m³ nier nonius compass nonius plate parallel perpendicular distance Place the instrument present bearing PROPOSITION quired random line right angles right line run a line run the line Set the instrument set the vernier sights to bear subtracted surveyor tance tang telescope to bear tion trapezoid traverse table tripod true bearing true line unclamp vernier to zero
Popular passages
Page 80 - All the interior angles of any rectilineal figure, together with four right angles, are equal to twice as many right angles as the figure has sides.
Page 17 - ... more than half through its thickness, and intersecting each other at right angles at the centre of the block...
Page 58 - A line which is to be established from the course only, should be re-run at nearly the same season...
Page 58 - It must, therefore, be a matter of uncertainty 'whether we have the correct bearing of the line, even when the change for years has been ascertained with the utmost care.
Page 57 - The variation of the magnetic needle in declination, is subject to much irregularity, in some instances increasing, in other decreasing, and some years having scarcely a perceptible motion.