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
... taken from 6 . - 7 x 3 , or . 3 , denotes that 7 is to be multiplied by 3 . 84 , denotes that 8 is to be divided by 4 . 2 : 34 : 6 , shows that 2 is to 3 as 4 is to 6 . 6 + 4 = 10 , shows that the sum of 6 and 4 is equal to 10 : ✓3 ...
... taken from 6 . - 7 x 3 , or . 3 , denotes that 7 is to be multiplied by 3 . 84 , denotes that 8 is to be divided by 4 . 2 : 34 : 6 , shows that 2 is to 3 as 4 is to 6 . 6 + 4 = 10 , shows that the sum of 6 and 4 is equal to 10 : ✓3 ...
Σελίδα 22
... taken for the assumed root , and the whole operation should be repeated . 2. Required the biquadrate root of 2.0743 . Here G = 2.0743 , Q = 1.2 , A = 1.2 * = 2.0736 , X = 4 , X + 1 = 5 , and X -- 1 = 3 . And 5 × 2.0736 = 10.3680 5 ...
... taken for the assumed root , and the whole operation should be repeated . 2. Required the biquadrate root of 2.0743 . Here G = 2.0743 , Q = 1.2 , A = 1.2 * = 2.0736 , X = 4 , X + 1 = 5 , and X -- 1 = 3 . And 5 × 2.0736 = 10.3680 5 ...
Σελίδα 23
... of indices , or logarithms , as there can be taken kinds of geometrical series . But the Loga- rithms most convenient for common uses are those adapted to a geometrical series increasing in a ten- fold LOGARITHMS . 23.
... of indices , or logarithms , as there can be taken kinds of geometrical series . But the Loga- rithms most convenient for common uses are those adapted to a geometrical series increasing in a ten- fold LOGARITHMS . 23.
Σελίδα 31
... taken for the index to the Logarithm of the Quo- tient . Likewise when one has been borrowed in the left hand place of the Decimal part of the Lo- garithm , add it to the Index of the Divisor , if affir- mative ; but subtract it , if ...
... taken for the index to the Logarithm of the Quo- tient . Likewise when one has been borrowed in the left hand place of the Decimal part of the Lo- garithm , add it to the Index of the Divisor , if affir- mative ; but subtract it , if ...
Σελίδα 33
... taken from 10 ; but if the index exceed 9 , it must be taken from 19. - It is frequently used in the rule of Proportion and Trigonometrical calculations , to change Subtrac tions into Additions . EXAMPLES . Ist . If a clock gain 14 ...
... taken from 10 ; but if the index exceed 9 , it must be taken from 19. - It is frequently used in the rule of Proportion and Trigonometrical calculations , to change Subtrac tions into Additions . EXAMPLES . Ist . If a clock gain 14 ...
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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.