Colliery Surveying: A Primer Designed for the Use of Students and Colliery Manager AspirantsMacmillan, 1896 - 163 σελίδες |
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Σελίδα xi
... East Scotland District South Staffordshire District . SCIENCE AND ART DEPARTMENT- Mining Examinations MISCELLANEOUS QUESTIONS AND ANSWERS 160 161 162 162 CHAPTER I INTRODUCTION SURVEYING is the art of taking such CONTENTS zi 23 .
... East Scotland District South Staffordshire District . SCIENCE AND ART DEPARTMENT- Mining Examinations MISCELLANEOUS QUESTIONS AND ANSWERS 160 161 162 162 CHAPTER I INTRODUCTION SURVEYING is the art of taking such CONTENTS zi 23 .
Σελίδα 56
... east 1888 17 ° 40 ' west 1657 0 ° 00 ' 1889 17 ° 35 ' 1818 24 ° 38 ' west 1890 17 ° 29 ' " " 1880 18 ° 33 ' 1891 17 ° 23 ' " " " " 1884 18 ° 8 ' 1892 17 ° 17 ' 22 1885 18 ° 2 ' 1893 17 ° 11 ' " " 1886 17 ° 54 ' 1894 17 ° 5 ' د ...
... east 1888 17 ° 40 ' west 1657 0 ° 00 ' 1889 17 ° 35 ' 1818 24 ° 38 ' west 1890 17 ° 29 ' " " 1880 18 ° 33 ' 1891 17 ° 23 ' " " " " 1884 18 ° 8 ' 1892 17 ° 17 ' 22 1885 18 ° 2 ' 1893 17 ° 11 ' " " 1886 17 ° 54 ' 1894 17 ° 5 ' د ...
Σελίδα 57
... east of Glasgow , has a declination of 20 ° west in 1896 , or 3 ° 10 ' more than at Greenwich . From 4 miles west of Land's End , by Aberystwith ( Cardigan ) , east point of Walney Island ( near Morecambe Bay ) , 4 miles east of ...
... east of Glasgow , has a declination of 20 ° west in 1896 , or 3 ° 10 ' more than at Greenwich . From 4 miles west of Land's End , by Aberystwith ( Cardigan ) , east point of Walney Island ( near Morecambe Bay ) , 4 miles east of ...
Σελίδα 65
... east on both sides , thus forming four quadrants of 90 degrees each . the centre of the box is a vertical finely - pointed pin , which supports a magnetic needle . The needle is slightly shorter than the inner diameter of the raised ...
... east on both sides , thus forming four quadrants of 90 degrees each . the centre of the box is a vertical finely - pointed pin , which supports a magnetic needle . The needle is slightly shorter than the inner diameter of the raised ...
Σελίδα 70
... east on number of degrees are read off and booked as a north - east bearing ; for example , assuming the north end of the needle to point to the division marked 20 between north and east , the bearing would be booked thus , N. 20 ° E. A ...
... east on number of degrees are read off and booked as a north - east bearing ; for example , assuming the north end of the needle to point to the division marked 20 between north and east , the bearing would be booked thus , N. 20 ° E. A ...
Άλλες εκδόσεις - Προβολή όλων
Colliery Surveying: A Primer Designed for the Use of Students and Colliery ... Thomas Aloysius O'Donahue Δεν υπάρχει διαθέσιμη προεπισκόπηση - 2018 |
Colliery Surveying: A Primer Designed for the Use of Students and Colliery ... Thomas Aloysius O'Donahue Δεν υπάρχει διαθέσιμη προεπισκόπηση - 2016 |
Colliery Surveying: A Primer Designed for the Use of Students and Colliery ... Thomas Aloysius O'Donahue Δεν υπάρχει διαθέσιμη προεπισκόπηση - 2017 |
Συχνά εμφανιζόμενοι όροι και φράσεις
accuracy acres ascertain back-sight base line bearing is taken calculated centre chain line clinometer colliery column commences correct bearing datum line deducted dial is clamped diameter direction distance dumpy level end of line equal example feet figure find the area fore-sight height horizontal inch inclination instrument isogonic lines legs length limb line drawn line of sight Link Chain loose needle bearing magnetic bearing magnetic declination magnetic meridian magnetic needle mark measurements meridian angle meridian line method Multiply necessary north and south north end number of degrees offsets ordinary parallel parallel ruler perpendicular placed plotted pricker PROB protractor reduced level right angles road ruler screw seam shaft shown by Fig side sight line spirit level square staff station straight line surveyor taking telescope theodolite triangle true north underground survey vane vernier plate vernier reading vertical angles Walney Island yards zero
Δημοφιλή αποσπάσματα
Σελίδα 20 - To draw a straight line at right angles to a given straight line, from a given point in the same.
Σελίδα 111 - Triangles on the same base, and between the same parallels, are equal.
Σελίδα 17 - Any two sides of a triangle are together greater than the third side.
Σελίδα 10 - A plane superficies is that in which any two points being taken, the straight line between them lies wholly in that superficies.
Σελίδα 14 - A diameter of a circle is a straight line drawn through the centre, and terminated both ways by the circumference.
Σελίδα 17 - 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.
Σελίδα 24 - RULE. — Multiply half the sum of the two parallel sides by the perpendicular distance between them, and the product will be the area.
Σελίδα 13 - A circle is a plane figure contained by one line, which is called the circumference, and is such that all straight lines drawn from a certain point within the figure to the circumference, are equal to one another.
Σελίδα 20 - ... are together greater than the. third. Let A, B, C be the three given lines, any two of which are together greater than the third.
Σελίδα 19 - 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.