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 15.
Σελίδα 14
... divisions , then each of these divisions is a degree , that is , the angle contained by two lines drawn from the centre to the circumference , and enclosing exactly one division , is called a degree . In the same manner theth part of ...
... divisions , then each of these divisions is a degree , that is , the angle contained by two lines drawn from the centre to the circumference , and enclosing exactly one division , is called a degree . In the same manner theth part of ...
Σελίδα 20
... parts . Let AB ( Fig . 54 ) be the given line . Suppose it is to be divided into four parts . Draw a line A3 , making any angle with AB , and through B draw B3 parallel to A3 . divisions ( 1 20 CHAP . COLLIERY SURVEYING.
... parts . Let AB ( Fig . 54 ) be the given line . Suppose it is to be divided into four parts . Draw a line A3 , making any angle with AB , and through B draw B3 parallel to A3 . divisions ( 1 20 CHAP . COLLIERY SURVEYING.
Σελίδα 21
... divisions AB , BC , CD , DE . Divide AB into 10 equal parts . Then if we take AB to represent 10 , each of 10 20 30 40 E Z FIG . 56 . the small divisions will represent 1 , or assuming AB to represent one , a small division would ...
... divisions AB , BC , CD , DE . Divide AB into 10 equal parts . Then if we take AB to represent 10 , each of 10 20 30 40 E Z FIG . 56 . the small divisions will represent 1 , or assuming AB to represent one , a small division would ...
Σελίδα 29
... divisions of a foot each is sometimes used . Each division consists of a bar of iron or steel , and the bars are connected together by small coupling links . Thus the length of the bar in a link chain is about 6 inches , and in a foot ...
... divisions of a foot each is sometimes used . Each division consists of a bar of iron or steel , and the bars are connected together by small coupling links . Thus the length of the bar in a link chain is about 6 inches , and in a foot ...
Σελίδα 30
... division on the chain a tag or index of brass about 11 inches in length is suspended , and as the number of tens from the beginning of the chain is known by the shape of the tag , to read off a certain length , all that is required is ...
... division on the chain a tag or index of brass about 11 inches in length is suspended , and as the number of tens from the beginning of the chain is known by the shape of the tag , to read off a certain length , all that is required is ...
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.