Colliery Surveying: A Primer Designed for the Use of Students and Colliery Manager AspirantsMacmillan, 1896 - 163 σελίδες |
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Σελίδα viii
... Offsets PAGE 22 26 28 28 28 ****** 22 **** 28 29 29 29 29 31 32 33 34 CHAPTER VI THE DETERMINATION OF INACCESSIBLE HEIGHTS AND DISTANCES- Two points inaccessible from one to the other 37 Two points inaccessible from one to the other ...
... Offsets PAGE 22 26 28 28 28 ****** 22 **** 28 29 29 29 29 31 32 33 34 CHAPTER VI THE DETERMINATION OF INACCESSIBLE HEIGHTS AND DISTANCES- Two points inaccessible from one to the other 37 Two points inaccessible from one to the other ...
Σελίδα x
... Offset Scales Plotting Offsets Protractors Plotting Triangulation Surveys Plotting Underground Surveys CHAPTER XIV 86 90 91 92 94 94 95 95 96 98 104 THE CALCULATION OF AREAS The Standard Measure of Area Casting by Triangles Casting by ...
... Offset Scales Plotting Offsets Protractors Plotting Triangulation Surveys Plotting Underground Surveys CHAPTER XIV 86 90 91 92 94 94 95 95 96 98 104 THE CALCULATION OF AREAS The Standard Measure of Area Casting by Triangles Casting by ...
Σελίδα 29
... offsets , measuring buildings , or for any short lengths . — The Steel Band.- -This is much used in the mines of America , and the accuracy of the measurements effected by it is perhaps greater than by a chain . Its greatest ...
... offsets , measuring buildings , or for any short lengths . — The Steel Band.- -This is much used in the mines of America , and the accuracy of the measurements effected by it is perhaps greater than by a chain . Its greatest ...
Σελίδα 34
... offsets , it is apparent that such measurements must be com- paratively short to avoid errors . The maximum practical length for offsets depends principally upon the scale to which the 34 СНАР . COLLIERY SURVEYING Offsets.
... offsets , it is apparent that such measurements must be com- paratively short to avoid errors . The maximum practical length for offsets depends principally upon the scale to which the 34 СНАР . COLLIERY SURVEYING Offsets.
Σελίδα 35
... offsets should not exceed 20 yards in length ; or , if the scale is to be 30 feet to an inch , they should not be more than 20 feet in length . When longer offsets are necessary a cross - staff or some other instrument for setting off a ...
... offsets should not exceed 20 yards in length ; or , if the scale is to be 30 feet to an inch , they should not be more than 20 feet in length . When longer offsets are necessary a cross - staff or some other instrument for setting off 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.