A Treatise on Land-surveying: Comprising the Theory Developed from Five Elementary Principles; and the Practice with the Chain Alone, the Compass, the Transit, the Theodolite, the Plane Table, & C. ...D. Appleton & Company, 1856 - 454 pages |
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Common terms and phrases
ABCD acres alidade axis base line calculated centre Chapter chord circle compass convenient corner correct course cross-hairs desired desired line determined diagonals difference direction distance divided division Double Longitude draw drawn East equal error feet field figure fixed gamboge given line given point half horizontal inaccessible inch instrument intersection Latitudes and Departures length line of sight Magnetic MAGNETIC BEARING marked Meridian method move needle object observed obtained offsets paper parallel pass perpendicular plane plat plate plumb-line preceding precisely prolonged protractor quadrilateral radius reading represent right angles scale screws side similar triangles sine South square chains station straight line subtract survey surveyor Table tangent telescope Theodolite Theorem tion township Transit trapezoid Trigonometry true North tube turn Variation Vernier Vernier scale vertical West whence
Popular passages
Page 153 - 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 379 - Every circumference of a. circle, whether the circle be large or small, is supposed to be divided into 360 equal parts called degrees. Each degree is divided into 60 equal parts called minutes, and each minute into 60 equal parts called seconds.
Page 370 - President may prescribe, to cause the lands thus situated to be surveyed in tracts of two acres in width, fronting on any river, bayou, lake, or watercourse, and running back the depth of forty acres...
Page 385 - In the same way it may be proved that a : b : : sin. A : sin. B, and these two proportions may be written a : 6 : c : : sin. A : sin. B : sin. C. THEOREM III. t8. In any plane triangle, the sum of any two sides is to their difference as the tangent of half the sum of the opposite angles is to the tangent of half their difference. By Theorem II. we have a : b : : sin. A : sin. B.
Page 174 - When the bearing is over 45° , the names of the columns must be read from the bottom of the page, the Latitude of any bearing, as 50°, being the Departure of the complement of this bearing, or 40°, and the Departure of 40° being the Latitude of 50°, &c.
Page 366 - No. 3, (the northeast corner of the same township), where measure and note the distance at which the line intersects the eastern boundary, north or south of the true or established corner. Run and measure westward, on the true line, (taking care to note all the land and water crossings, &c., as per instructions), to No. 4, which is identical with No. 2, establishing the...
Page 367 - E., and proceed as with townships situated " north and west," except that the random or trial lines will be run and measured west, and the true lines, east, throwing the excess over or deficiency under four hundred and eighty chains on the west end of the line, as required by law ; wherefore...
Page 366 - ... (either of which would indicate an important error in the surveying,) the lines must be retraced, even if found necessary to remeasure the meridional boundaries of the township, (especially the western boundary,) so as to discover and correct the error ; in doing which, the true corners must be established and marked, and the false ones destroyed and obliterated to prevent confusion in future ; and all the facts must be distinctly
Page 44 - The content of a Trapezoid equals half the product of the sum of the parallel sides by the perpendicular distance between them.
Page 155 - ... draw lines of direction along those streets, using two men as marks, or poles set in wooden pedestals, or perhaps some remarkable places in the houses at the farther ends, as windows, doors, corners...