## Surveying Manual ; a Surveying |

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### Common terms and phrases

adjustment angle assigned axis azimuth base bearing bubble calculated carefully chain chainman collimation compass Compute corners correct Cosec'nt Cosecant Cosine Cotang Cube curve determine difference direction distance drive elevation engineers equal error established feet field field notes figures flag pole foot Functions give given grade ground hand head horizontal Hours Latitude length Logarithms mark means measured meridian method minutes Natural nearest needle notes objective observations original parallel party pins plane plat plate plumb Polaris position practice precision PROBLEM record reference reverse Root rule scale screws Secant shown side sight Sine square stadia stake standard station steel tape survey taken taking Tang Tangent tape telescope tion transit triangle true turning units usually vernier vertical West

### Popular passages

Page 164 - All the corners marked in the surveys, returned by the surveyor general, or by the surveyor of the land south of the state of Tennessee, respectively, shall be established as the proper corners of sections, or subdivisions of sections, which they were intended to designate...

Page 383 - The logarithm of a fraction is equal to the logarithm of the numerator minus the logarithm of the denominator.

Page 164 - That the surveyor general shall cause the townships west of the Muskingum, which, by the above-mentioned act, are directed to be sold in quarter townships, to be subdivided into half sections of three hundred and twenty acres each, as nearly as may be, by running parallel lines through the same from east to west, and from south to north...

Page 382 - The Logarithm of a number to a given base is the index of the power to which the base must be raised to give the number. Thus if m = a", x is called the logarithm of m to the base a.

Page 73 - To make the bubble line and the bottom element of the rings parallel. — Make the element level with the foot screws and bring the bubble to the middle by means of the altitude adjusting screws. The element is made level by the method of reversions as follows: With the level clamped over a pair of foot screws, as above, lift the clips and level up precisely; cautiously lift the telescope out of the wyes, turn it end for end, and very...

Page 170 - That the original township, section, and quarter-section corners established by the Government surveyors must stand as the true corners which they were intended to represent, whether the corners be in, place or not.

Page 170 - An obliterated corner is one where no visible evidence remains of the work of the original surveyor in establishing it. Its location may. however, have been preserved beyond all question by acts of landowners, and by the memory of those who knew and recollect the true situs of the original monument. In such cases it is not a lost corner. A lost corner is one whose position cannot be determined, beyond reasonable doubt, either from original marks or reliable external evidence.

Page 164 - The boundary lines. actually run and marked in the surveys returned by the surveyor-general, shall be established as the proper boundary lines of the sections, or subdivisions, for which they were intended, and the length of such lines, as returned, shall be held and considered as the true length thereof.

Page 383 - The logarithm of any power of a number is equal to the logarithm of the number multiplied by the exponent of the power.

Page 147 - These adjustments are practically the same as those for the transit. THE SEXTANT. Description. — The sextant consists of an arc of 60°, with each half degree numbered as a whole degree, (a), Fig. 31, combined with mirrors so arranged that angles can be measured to 120°.