The Theory and Practice of Surveying: Containing All the Instructions Requisite for the Skilful Practice of this ArtE. Duyckinck, 1811 - 508 σελίδες |
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Σελίδα 1
... bearings of their most remarkable places from each other , it is usually denominated Mari- time - Surveying . This branch of Surveying , how- ever , demands no other qualifications than those , which should be thoroughly acquired by ...
... bearings of their most remarkable places from each other , it is usually denominated Mari- time - Surveying . This branch of Surveying , how- ever , demands no other qualifications than those , which should be thoroughly acquired by ...
Σελίδα 154
... bearing of the first stationary line AB , let the line be measured , and the length thereof in chains and links be ... bearings and stationary distances . Having done with your first station , set the in- strument over the hole or spot ...
... bearing of the first stationary line AB , let the line be measured , and the length thereof in chains and links be ... bearings and stationary distances . Having done with your first station , set the in- strument over the hole or spot ...
Σελίδα 156
... bearings of the lines AB and BC ; you may then set up your instrument at D , from whence take a back - sight to C , and a fore- sight to E : thus the bearings may be taken quite round , and the stationary distances being annexed to them ...
... bearings of the lines AB and BC ; you may then set up your instrument at D , from whence take a back - sight to C , and a fore- sight to E : thus the bearings may be taken quite round , and the stationary distances being annexed to them ...
Σελίδα 158
... bearings , as before ; the difference of these bearings , if less than 180 , will be the quantity of degrees contain- ed in the given angle ; but if more , take it from 360 , and the remainder will be the degrees contain- ed in the ...
... bearings , as before ; the difference of these bearings , if less than 180 , will be the quantity of degrees contain- ed in the given angle ; but if more , take it from 360 , and the remainder will be the degrees contain- ed in the ...
Σελίδα 159
... bearing of every stationary distance line , from the meridian ; as the circumferentor and quartered compass do . To take the angles of the field . ' PL . 6. fig . 6 . Lay the ends of your index to 360 ° , and 180 ° ; turn the whole ...
... bearing of every stationary distance line , from the meridian ; as the circumferentor and quartered compass do . To take the angles of the field . ' PL . 6. fig . 6 . Lay the ends of your index to 360 ° , and 180 ° ; turn the whole ...
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Συχνά εμφανιζόμενοι όροι και φράσεις
acres altitude Answer arch azimuth base bearing blank line centre chains and links chord circle circumferentor Co-sec Co-tang column compasses contained decimal difference distance line divided divisions draw east Ecliptic edge feet field-book figures fore four-pole chains geom given number half the sum Horizon glass hypothenuse inches instrument Lat Dep Lat latitude length logarithm measure meridian distance multiplied natural co-sine natural sine needle Nonius number of degrees object observed off-sets opposite parallel parallelogram pegs perches perpendicular plane pole pole star Portmarnock PROB protractor Quadrant quotient radius right angles right line scale of equal SCHOLIUM screw Secant sect Sextant side sights square station stationary distance subtract Sun's survey taken Tang tangent theo theodolite trapezium triangle ABC trigonometry two-pole chains vane versed sine vulgar fraction whence
Δημοφιλή αποσπάσματα
Σελίδα 38 - 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 25 - 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 197 - RULE. From half the sum of the three sides subtract each side severally.
Σελίδα 106 - C' (89) (90) (91) (92) (93) 112. In any plane triangle, the sum of any two sides is to their difference as the tangent of half the sum of the opposite angles is to the tangent of half their difference.
Σελίδα 27 - The VERSED SINE of an arc is that part of the diameter which is between the sine and the arc. Thus BA is the versed sine of the arc AG.