Surveying and Navigation, with a Preliminary Treatise on Trigonometry and MensurationVan Antwerp, Braggs & Company, 1864 - 490 páginas |
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Página iv
... made accessible to the student . The methods of finding the true meridian and the variation of the needle have been given at length ; also specific direc- tions for finding corners , taking bearings , measuring lines iv PREFACE .
... made accessible to the student . The methods of finding the true meridian and the variation of the needle have been given at length ; also specific direc- tions for finding corners , taking bearings , measuring lines iv PREFACE .
Página 187
... meridian and base lines , another for standard parallels or correction lines , another for exterior or township lines , and another for subdivision or section lines , as designated on the title - page . A good pencil , number 2 or 3 ...
... meridian and base lines , another for standard parallels or correction lines , another for exterior or township lines , and another for subdivision or section lines , as designated on the title - page . A good pencil , number 2 or 3 ...
Página 193
... meridian . The absolute variation of the needle being known , not simply its change since a given date , move the vernier to the right or left , according as the variation is west or east , till the given variation is turned off , screw ...
... meridian . The absolute variation of the needle being known , not simply its change since a given date , move the vernier to the right or left , according as the variation is west or east , till the given variation is turned off , screw ...
Página 209
... meridian . The difference of longitude , divided by 15 , will , by changing degrees , minutes , and seconds into hours , minutes , and seconds , give the difference of time , which is usually taken to the nearest hour , as it will be ...
... meridian . The difference of longitude , divided by 15 , will , by changing degrees , minutes , and seconds into hours , minutes , and seconds , give the difference of time , which is usually taken to the nearest hour , as it will be ...
Página 210
... of 45 ° , 1 ' ; at the zenith , O. Meridional refraction , by increasing the apparent al- titude of the sun , when on the meridian , increases or diminishes its apparent declination according as it is north or 210 SURVEYING .
... of 45 ° , 1 ' ; at the zenith , O. Meridional refraction , by increasing the apparent al- titude of the sun , when on the meridian , increases or diminishes its apparent declination according as it is north or 210 SURVEYING .
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Términos y frases comunes
a. c. log ABCD adjacent angles adjacent sides altitude angle is equal arc increases base line C₁ chains clamp co-sine compass cosec Cotang denote departure diameter difference of level divided east escribed circles Examples feet field notes Find the angle find the area formulas frustum given side height hence horizontal hypotenuse included angle increases from 90 instrument intersection latitude links dist logarithm longitude M.
M. Cosine M.
M. Sine mantissa meander miles minus needle negative number corresponding offsets opposite angle parallel sailing parallelogram perpendicular plane plane sailing positive quarter section corner radius rhumb line right angle sailing secant ship side adjacent sin A sin solar compass spherical triangle stake standard parallel station survey surveyor Tang tangent telescope trapezoid variation vernier versed-sine vertex vertical Willamette Meridian
Pasajes populares
Página 110 - I. The sine of the middle part is equal to the product of the tangents of the adjacent parts.
Página 34 - If two triangles have two angles and the included side of the one, equal to two angles and the included side of the other, each to each, the two triangles will be equal.
Página 258 - All the corners marked in the surveys, returned by the surveyor general, or by the surveyor of the lands 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 ; and the corners of half and quarter sections, not marked on said surveys, shall be placed as nearly as possible equidistant from those two corners which stand on the same line.
Página 22 - The logarithm of any power of a number is equal to the logarithm of the number multiplied by the exponent of the power.
Página 19 - To Divide One Number by Another, Subtract the logarithm of the divisor from the logarithm of the dividend, and obtain the antilogarithm of the difference.
Página 144 - Any angle is greater than the difference between 180° and the sum of the other two angles.
Página 124 - That is, the sines of the sides of a spherical triangle are proportional to the sines of the opposite angles.
Página 65 - C' (89) (90) (91) (92) (93) 112. 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.
Página 145 - A cos 6 = cos a cos c + sin a sin c cos B cos c = cos a cos 6 + sin a sin 6 cos C Law of Cosines for Angles cos A = — cos B...
Página 162 - Now, since the areas of similar polygons are to each other as the squares of their homologous sides...