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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Αποτελέσματα 1 - 5 από τα 19.
Σελίδα 69
... lines , A and B. Draw two indefinite blank lines CE , CD , any- wise to make any angle . Lay the line A , from C to F ; and the line B , from C , to G ; and draw the line FG ; lay again the line A , from C to H ; and through H , draw HI ...
... lines , A and B. Draw two indefinite blank lines CE , CD , any- wise to make any angle . Lay the line A , from C to F ; and the line B , from C , to G ; and draw the line FG ; lay again the line A , from C to H ; and through H , draw HI ...
Σελίδα 70
... blank line , as AF , on which lay the line A , from A to B , and the line B , from B to C , on the point B , which is the joining point of the lines A and B ; erect a perpendicular BD ( by prob . 5. ) bisect AC in E ( by prob . 4. ) and ...
... blank line , as AF , on which lay the line A , from A to B , and the line B , from B to C , on the point B , which is the joining point of the lines A and B ; erect a perpendicular BD ( by prob . 5. ) bisect AC in E ( by prob . 4. ) and ...
Σελίδα 71
... line AB , in the point E , so that AE shall have the same proportion to EB , as two given lines C and D have . Draw an indefinite blank line , AF , to the ex- tremity of the line AB , to make with it any an- gle ; lay the line C , from ...
... line AB , in the point E , so that AE shall have the same proportion to EB , as two given lines C and D have . Draw an indefinite blank line , AF , to the ex- tremity of the line AB , to make with it any an- gle ; lay the line C , from ...
Σελίδα 93
... line is made use of for some relative convenience : it is thus the ... blank side represents the diameter of a circle . The side of the protract ... line , apply the diameter of the pro- tractor to the line , so that the centre thereof ...
... line is made use of for some relative convenience : it is thus the ... blank side represents the diameter of a circle . The side of the protract ... line , apply the diameter of the pro- tractor to the line , so that the centre thereof ...
Σελίδα 108
... blank lines , as before . From a scale of equal parts lay 190 from A to B on the point B , erect a per- pendicular BC ( by prob . 5. sect . 4. ) the point where this cuts the other blank line of the angle , will be C so is the triangle ...
... blank lines , as before . From a scale of equal parts lay 190 from A to B on the point B , erect a per- pendicular BC ( by prob . 5. sect . 4. ) the point where this cuts the other blank line of the angle , will be C so is the triangle ...
Άλλες εκδόσεις - Προβολή όλων
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.