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acres adjustment alidade altitude Article axis azimuth base bearings and distances boundary bubble centre line chains circle clamp column correction declination arc deflection determine difference direction divide division line east equal equatorial lines error EXAMPLES feet figure grade ground height horizontal inches indicate instrument intersection latitude and departure length limb located log cot log log tan log magnetic main socket marked meander measure method miles needle object observed obtain parallel perpendicular plate plot polar Polaris polygon position principal meridian radius random line reading refraction right angles scale screws side sin log tan socket Solar Attachment solar compass square stadia station streets surface survey surveyor tan log cot tangent tangent-screw tape telescope tion township transit transit survey trapezium trapezoid triangle true line vernier whence wires zero
Page 297 - ... the sections shall be numbered, respectively, beginning with the number one, in the northeast section, and proceeding west and east alternately, through the township, with progressive numbers, till the thirty-sixth be completed.
Page 296 - The plats of the townships respectively, shall be marked by subdivisions into lots of one mile square or 640 acres, in the same direction as the external lines, and numbered from 1 to 36...
Page 400 - ... it nevertheless determined the extent of his possessions, and he gained or lost according as the mistake did or did not favor him. It will probably be admitted that no man loses title to his land or any part thereof merely because the evidences become lost or uncertain. It may become more difficult for him to establish it as against an adverse claimant, but theoretically the right remains; and it remains as a potential fact so long as he can present better evidence than any other person. And...
Page 85 - Whenever the instrument is set in the meridian, as will be hereafter described, the index of the hour arc should read apparent time. If not, loosen the two flat head screws on the top of the hour circle, and with the hand turn the circle around until it does, fasten the screws again, and the adjustment will be complete.
Page 281 - Allowance for Declination : Let us now suppose the observation made when the sun has passed the equinoctial point, and when his position is affected by declination. By referring to the almanac, and setting off on the arc his declination for the given day and hour, we are still able to determine his position with the same certainty as if he remained on the equator.
Page 398 - A generation has passed away since they were converted into cultivated farms, and few if any of the original corner and quarter stakes now remain. The corner and quarter stakes were often nothing but green sticks driven into the ground. Stones might be put around or over these if they were handy, but often they were not, and the, witness trees must be relied upon after the stake was gone. Too often the first settlers were careless in fixing their lines with accuracy while monuments remained, and...
Page 408 - ... owners are fixed by their purchase; when making that, they have a right to understand that all land between the meander lines, not separately surveyed and sold, will pass with the shore in the government sale and, having this right, anything which their purchase would include under it cannot afterward be taken from them. It is believed, however, that the Federal courts would not recognize the applicability of this rule to large navigable rivers, such as those uniting the Great Lakes. On all the...
Page 286 - AM ; this gives us the starting. point. To obtain the declination for the other hours of the day, take from the Almanac the declination for apparent noon of the given day, and, as the declination is increasing or decreasing, add to or subtract from the declination of the first hour the difference for one hour as given in the ephemeris, which •will give, when affected by the refraction, the declination for the succeeding hour ; and proceed thus in making a table of the declination for every hour...
Page 402 - ... surveyor himself to annoyance and perhaps discredit, since in a legal controversy the law as well as common sense must declare that a supposed boundary line long acquiesced in is better evidence of where the real line should be than any survey made after the original monuments have disappeared.