The Theory and Practice of Surveying: Containing All the Instructions Requisite for the Skilful Practice of this Art. With a New Set of Accurate Mathematical TablesA. S. Barnes, 1839 - 412 σελίδες |
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Σελίδα 97
... chains , the perpendicular Ans . BC 980 chains To find the angles and base . Given , Ex . 6. In the right - angled triangle ABC , the base AB 735.9 links , the perpendicular BC 320 To find the angles and hypothenuse . < C 66 ° 30 ...
... chains , the perpendicular Ans . BC 980 chains To find the angles and base . Given , Ex . 6. In the right - angled triangle ABC , the base AB 735.9 links , the perpendicular BC 320 To find the angles and hypothenuse . < C 66 ° 30 ...
Σελίδα 109
... links of a four - pole chain , there is a large ring , or sometimes a round piece of brass , fixed two large rings . In such chains as have a at every 10 links ; and at 50 links , or in the middle , there are OF THE CHAIN . 109.
... links of a four - pole chain , there is a large ring , or sometimes a round piece of brass , fixed two large rings . In such chains as have a at every 10 links ; and at 50 links , or in the middle , there are OF THE CHAIN . 109.
Σελίδα 110
... chains as have a brass piece at every 10 links , there is the figure 1 on the first piece , 2 on the second , 3 on the third , & e . to 9. By leading therefore that end of the chain forward which has the least number next to it , he who ...
... chains as have a brass piece at every 10 links , there is the figure 1 on the first piece , 2 on the second , 3 on the third , & e . to 9. By leading therefore that end of the chain forward which has the least number next to it , he who ...
Σελίδα 111
... links be annexed , the distance line required in chains and links is obtained , which must be registered in the field - book , as will hereafter be shown . If the distance exceeds 10 , 20 , 30 , & c . chains , when the leader's pegs are ...
... links be annexed , the distance line required in chains and links is obtained , which must be registered in the field - book , as will hereafter be shown . If the distance exceeds 10 , 20 , 30 , & c . chains , when the leader's pegs are ...
Σελίδα 112
... chain cannot be car- ried horizontally , half a chain , or less , may , and the sum of these half - chains , or links , will give the base , as before . If the inclined side of the hill be the plane surface , the angle of the hill's ...
... chain cannot be car- ried horizontally , half a chain , or less , may , and the sum of these half - chains , or links , will give the base , as before . If the inclined side of the hill be the plane surface , the angle of the hill's ...
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Συχνά εμφανιζόμενοι όροι και φράσεις
ABCD acres altitude arch base bearing blank line centre chains and links circle circumferentor column compasses contained Cosine Sine cube root decimal diagonal diameter difference of latitude divided divisions divisor draw east ecliptic edge EXAMPLE feet field-book figure four-pole chains geometrical series given angle given number half the sum height Hence horizon glass hypothenuse inches instrument length logarithm manner measure meridian distance multiplied needle nonius number of degrees object observed opposite parallelogram perches perpendicular plane prob PROBLEM proportion protractor quadrant quotient radius rhombus right angles right line scale of equal screw secant sect sector semicircle side Sine Cotang square root station stationary distance subtract suppose survey taken Tang tangent theo theodolite THEOREM trapezium triangle ABC trigonometry two-pole chains vane vulgar fraction whence
Δημοφιλή αποσπάσματα
Σελίδα 49 - The angle in a semicircle is a right angle ; the angle in a segment greater than a semicircle is less than a right angle ; and the angle in a segment less than a semicircle is greater than a right angle.
Σελίδα 41 - The circumference of every circle is supposed to be divided into 360 equal parts, called degrees ; and each degree into 60 equal parts, called minutes ; and each minute into 60 equal parts, called seconds ; and these into thirds, &c.
Σελίδα 41 - The radius of a circle is a right line drawn from the centre to the circumference.
Σελίδα 45 - A lemma is something which is premised, or demonstrated, in order to render what follows more easy. A corollary is a consequent truth derived immediately from some preceding truth or demonstration.
Σελίδα 35 - DIVISION BY LOGARITHMS. RULE. From the logarithm of the dividend subtract the logarithm of the divisor, and the number answering to the remainder will be the quotient required.
Σελίδα 21 - Then multiply the second and third terms together, and divide the product by the first term: the quotient will be the fourth term, or answer.