Colliery Surveying: A Primer Designed for the Use of Students and Colliery Manager AspirantsMacmillan, 1896 - 163 σελίδες |
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Σελίδα 32
... arrow into the ground and advances another chain forward , the follower in this case holding his end of the chain at the arrow stuck in the ground . The chain is again stretched , the follower takes up the arrow at his end of the chain ...
... arrow into the ground and advances another chain forward , the follower in this case holding his end of the chain at the arrow stuck in the ground . The chain is again stretched , the follower takes up the arrow at his end of the chain ...
Σελίδα 33
... arrows have been exchanged six times , and the follower has five arrows , and there is an arrow down , then the number of chains measured will be 66 , or 6600 links . across . In some cases the line is ranged out in such a position that ...
... arrows have been exchanged six times , and the follower has five arrows , and there is an arrow down , then the number of chains measured will be 66 , or 6600 links . across . In some cases the line is ranged out in such a position that ...
Σελίδα 46
... arrow , which the leader will have left at the for- ward end of the first chain length . It is then seen that a bend in the hedge on the right - hand side necessitates an offset being taken from 10 on the second chain , and a bend on ...
... arrow , which the leader will have left at the for- ward end of the first chain length . It is then seen that a bend in the hedge on the right - hand side necessitates an offset being taken from 10 on the second chain , and a bend on ...
Σελίδα 96
... arrow to the point in the chain line , as represented by the scale measurements at which the offset was taken . The position of the offset scale , as shown in sketch , is for an offset at 94 . The distance of the object offsetted from ...
... arrow to the point in the chain line , as represented by the scale measurements at which the offset was taken . The position of the offset scale , as shown in sketch , is for an offset at 94 . The distance of the object offsetted from ...
Σελίδα 100
... to be drawn to or from them . Number the line , and draw an arrow - head to indicate in which direction it was run . There is a note in the Field Book to the effect that the bearing of this line 100 CHAP . COLLIERY SURVEYING.
... to be drawn to or from them . Number the line , and draw an arrow - head to indicate in which direction it was run . There is a note in the Field Book to the effect that the bearing of this line 100 CHAP . COLLIERY SURVEYING.
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.