Field and Colliery Surveying: A Primer Designed for the Use of Students of Surveying and Colliery Manager AspirantsMacmillan & Company, 1911 - 263 páginas |
Dentro del libro
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Página viii
... Methods of Measuring THE Pacing The Wheel The Tape The Steel Band Rods The Chain Staffing out . To measure a Line Obstacles to Measuring Incline Measuring Offsets Degree of Accuracy required DETERMINATION DISTANCES- PAGE 25 885 26 30 32 ...
... Methods of Measuring THE Pacing The Wheel The Tape The Steel Band Rods The Chain Staffing out . To measure a Line Obstacles to Measuring Incline Measuring Offsets Degree of Accuracy required DETERMINATION DISTANCES- PAGE 25 885 26 30 32 ...
Página x
... Method with First Line as Base Line 128 Method with each Preceding Sight as Base Line 130 Comparison of Various Methods 131 To take Accurate Observations 132 CHAPTER XIV CONNECTING THE SURFACE AND UNDERGROUND SURVEYS- The Magnetic ...
... Method with First Line as Base Line 128 Method with each Preceding Sight as Base Line 130 Comparison of Various Methods 131 To take Accurate Observations 132 CHAPTER XIV CONNECTING THE SURFACE AND UNDERGROUND SURVEYS- The Magnetic ...
Página xi
... Method The Clinometer The Geometrical Method 178 178 180 Stave and Mason's Level The Dumpy Level . Simple Flying Levels Simple Section Levelling 180 182 183 184 Compound Flying Levels 185 Bench Marks 187 Compound Section Levelling 187 ...
... Method The Clinometer The Geometrical Method 178 178 180 Stave and Mason's Level The Dumpy Level . Simple Flying Levels Simple Section Levelling 180 182 183 184 Compound Flying Levels 185 Bench Marks 187 Compound Section Levelling 187 ...
Página 4
... method is not applicable to underground surveys , so that in addition to the measurements observations must be taken of all angles . The simplest form of instrument for taking angular observa- tions , in general colliery use , is the ...
... method is not applicable to underground surveys , so that in addition to the measurements observations must be taken of all angles . The simplest form of instrument for taking angular observa- tions , in general colliery use , is the ...
Página 7
... method . This instrument is used by many persons for drawing short straight lines in preference to the ordinary ruler . The T Square ( Fig . 6 ) .— This consists of two pieces of wood joined at right angles . It is used for the same ...
... method . This instrument is used by many persons for drawing short straight lines in preference to the ordinary ruler . The T Square ( Fig . 6 ) .— This consists of two pieces of wood joined at right angles . It is used for the same ...
Términos y frases comunes
accuracy accurate acres adjusted alidade ascertain back-sight calculated centre chain line chord clamped clinometer coal colliery column commences compass box contour lines datum line dial difference direction distance division drawing drawn dumpy level equal error example fast needle feet Field Book figure fixed fore-sight frustum graduated Gunter's chain height horizontal hypothenuse inch inclination instrument isogonic lines legs length limb magnetic bearing magnetic declination magnetic meridian magnetic needle marked means measurements meridian angle meridian base line meridian line method necessary needle survey observation obtained offsets parallel parallel ruler perpendicular placed plotted pricker protractor radius reduced level right angles road ruler scale screw seam shaft shown by Fig side sight line sight vanes spirit level square station straight line surveyor taken taking telescope theodolite tie line traverse triangle true north underground survey vernier plate vernier reading yards zero
Pasajes populares
Página 22 - To draw a straight line at right angles to a given straight line, from a given point in the same.
Página 164 - Triangles on the same base, and between the same parallels, are equal.
Página 19 - Any two sides of a triangle are together greater than the third side.
Página 249 - A section of the strata sunk through, or, if that is not reasonably " practicable, a statement of the depth of the shaft with a section
Página 248 - Every such plan must be on a scale of not less than that of the Ordnance Survey of twenty-five inches to the mile, or on the same scale as the plan for the time being in use at the mine.
Página 16 - A diameter of a circle is a straight line drawn through the centre, and terminated both ways by the circumference.
Página 19 - When the three angles of one are equal to the three angles of the other, each to each, the adjoining diagram shews that the triangles need not be equal in all respects.
Página 12 - A plane superficies is that in which any two points being taken, the straight line between them lies wholly in that superficies.
Página 21 - To bisect a given finite straight line, that is, to divide it into two equal parts. Let AB be the given straight line; it is required to divide it into two equal parts.
Página 34 - We have, then, that the sine of an angle is equal to the cosine of its complement, and conversely.