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 21.
Σελίδα ix
... Vernier The Arc Vernier . PAGE 44 46 53 གླབ་ བ་ གླ་ གླ 55 55 56 57 57 58 59 60 69 CHAPTER X SURVEYING INSTRUMENTS- The Hedley Dial . 64 To make an Observation with the Dial 69 Improved Dials The Theodolite FX 71 73 CHAPTER XI SURVEYING ...
... Vernier The Arc Vernier . PAGE 44 46 53 གླབ་ བ་ གླ་ གླ 55 55 56 57 57 58 59 60 69 CHAPTER X SURVEYING INSTRUMENTS- The Hedley Dial . 64 To make an Observation with the Dial 69 Improved Dials The Theodolite FX 71 73 CHAPTER XI SURVEYING ...
Σελίδα 58
... VERNIER A VERNIER is an instrument by 58 CHAP . VIII COLLIERY SURVEYING The Influence of Iron or Steel on the Magnetic Needle.
... VERNIER A VERNIER is an instrument by 58 CHAP . VIII COLLIERY SURVEYING The Influence of Iron or Steel on the Magnetic Needle.
Σελίδα 59
... VERNIER A VERNIER is an instrument by which readings can be obtained from a scale to a fraction of the divisions into which it is divided . The vernier consists of a small scale which slides along the main scale from which the readings ...
... VERNIER A VERNIER is an instrument by which readings can be obtained from a scale to a fraction of the divisions into which it is divided . The vernier consists of a small scale which slides along the main scale from which the readings ...
Σελίδα 60
... vernier will require to be added , and as each division is ths , seven divisions 77 ths , or 77. Then , 8 + 77 1.57 as before . A direct straight limb vernier , giving the same reading as the ... Vernier The Arc Vernier PAGE 44 གླབ་བ་གླ་གླ.
... vernier will require to be added , and as each division is ths , seven divisions 77 ths , or 77. Then , 8 + 77 1.57 as before . A direct straight limb vernier , giving the same reading as the ... Vernier The Arc Vernier PAGE 44 གླབ་བ་གླ་གླ.
Σελίδα 61
... vernier . The reading is taken from the zero of the vernier in every case , and as readings are taken both to the right and left , a double vernier 10 60 FIG . S1 . is necessary , or , what is equally as good , two half verniers , one ...
... vernier . The reading is taken from the zero of the vernier in every case , and as readings are taken both to the right and left , a double vernier 10 60 FIG . S1 . is necessary , or , what is equally as good , two half verniers , one ...
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.