Surveying and Navigation, with a Preliminary Treatise on Trigonometry and MensurationVan Antwerp, Braggs & Company, 1864 - 490 páginas |
Dentro del libro
Resultados 1-5 de 16
Página 187
... vernier magnetic compass is exhibited in the drawing on page 189 . The needle turns freely on a pivot at the center , and settles in the magnetic meridian . The compass circle is divided , on its upper surface , to half - degrees ...
... vernier magnetic compass is exhibited in the drawing on page 189 . The needle turns freely on a pivot at the center , and settles in the magnetic meridian . The compass circle is divided , on its upper surface , to half - degrees ...
Página 188
... vernier is a scale movable by the side of another scale , and divided into parts each a little greater or a little less than a part of the other , and having a known ratio to it . In the drawing the vernier is represented on the plate ...
... vernier is a scale movable by the side of another scale , and divided into parts each a little greater or a little less than a part of the other , and having a known ratio to it . In the drawing the vernier is represented on the plate ...
Página 191
... vernier CD , attached to the compass box , which is movable around the main plate , be so graduated that 30 spaces of the vernier shall be equal to 31 spaces of the limb , that is , equal to 31 x 30 ' ; then 1 space of the vernier will ...
... vernier CD , attached to the compass box , which is movable around the main plate , be so graduated that 30 spaces of the vernier shall be equal to 31 spaces of the limb , that is , equal to 31 x 30 ' ; then 1 space of the vernier will ...
Página 192
... vernier at the left of its O will coincide with the first division line of the limb at the left of its 0 ; if the vernier be moved for- ward 2 ' to the right , then the second division line of the vernier at the left of its 0 will ...
... vernier at the left of its O will coincide with the first division line of the limb at the left of its 0 ; if the vernier be moved for- ward 2 ' to the right , then the second division line of the vernier at the left of its 0 will ...
Página 193
... vernier . Verniers may be so graduated as to read to any appreciable angle ; but the graduation which reads to minutes is the most common . 237. Uses of the Vernier . 1. To turn off the variation . Let the instrument be placed on some ...
... vernier . Verniers may be so graduated as to read to any appreciable angle ; but the graduation which reads to minutes is the most common . 237. Uses of the Vernier . 1. To turn off the variation . Let the instrument be placed on some ...
Otras ediciones - Ver todas
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...