Colliery Surveying: A Primer Designed for the Use of Students and Colliery Manager AspirantsMacmillan, 1896 - 163 σελίδες |
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Αποτελέσματα 1 - 5 από τα 14.
Σελίδα 33
... deduct a certain length from the measurement , or to take short measurements up the slope- the chain being held ... deductions , etc. , for incline MEASUREMENTS 33 Incline Measuring.
... deduct a certain length from the measurement , or to take short measurements up the slope- the chain being held ... deductions , etc. , for incline MEASUREMENTS 33 Incline Measuring.
Σελίδα 34
... deducted per chain to reduce incline measurements to true level or horizontal measurement . The following is , so far as the author is aware , an original rule , and is approximately correct up to 45 degrees : — Square the number of ...
... deducted per chain to reduce incline measurements to true level or horizontal measurement . The following is , so far as the author is aware , an original rule , and is approximately correct up to 45 degrees : — Square the number of ...
Σελίδα 52
... deducting this length from the length of the second station on line 1 . The order in which the lines are run is shown by the numbers enclosed by circles , and their direction by the arrowheads . The small circles on the lines represent ...
... deducting this length from the length of the second station on line 1 . The order in which the lines are run is shown by the numbers enclosed by circles , and their direction by the arrowheads . The small circles on the lines represent ...
Σελίδα 60
... deducted , so as to obtain the measurement , the number of divisions vernier between this point and the zero , namely , seven . Each vernier division = '09 inch , therefore seven divisions = · 09 × 7 = · 63 . Then 2.2-63 = 1 · 57 as ...
... deducted , so as to obtain the measurement , the number of divisions vernier between this point and the zero , namely , seven . Each vernier division = '09 inch , therefore seven divisions = · 09 × 7 = · 63 . Then 2.2-63 = 1 · 57 as ...
Σελίδα 91
... deduction being made . As an example of how the angles are calculated take the following angles , the first of which ... deducted to give the correct angle thus 80 + 313 = 393 and 393 – 360 = 33 , which is the meridian angle of the third ...
... deduction being made . As an example of how the angles are calculated take the following angles , the first of which ... deducted to give the correct angle thus 80 + 313 = 393 and 393 – 360 = 33 , which is the meridian angle of the third ...
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.