The Theory and Practice of Surveying: Containing All the Instructions Requisite for the Skilful Practice of this ArtE. Duyckinck, 1811 - 508 páginas |
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Página 12
... decimal sought . 1920 800 640 1600 1600 Reduce 21 minutes 54 seconds to the decimal of a degree . Ans . .365 Reduce 056 of a pole to the decimal of an Acre . Ans . .00035 Reduce 13 cents to the decimal of an Eagle . 12 DECIMAL FRACTIONS .
... decimal sought . 1920 800 640 1600 1600 Reduce 21 minutes 54 seconds to the decimal of a degree . Ans . .365 Reduce 056 of a pole to the decimal of an Acre . Ans . .00035 Reduce 13 cents to the decimal of an Eagle . 12 DECIMAL FRACTIONS .
Página 13
... minutes to the decimal of a day . Ans . .00972+ Reduce 3 hours 46 minutes to the decimal of a week . Ans . .0224206+ RULE III . To find the value of Decimal Fractions in terms of the lower denominations . Multiply the given decimal by ...
... minutes to the decimal of a day . Ans . .00972+ Reduce 3 hours 46 minutes to the decimal of a week . Ans . .0224206+ RULE III . To find the value of Decimal Fractions in terms of the lower denominations . Multiply the given decimal by ...
Página 39
... minutes , and each minute into 60 equal parts cal- ed seconds , and these into thirds , fourths , & c . these parts being greater or less as the radius is . 17. A chord is a right line drawn from one end of an arc or arch ( that is ...
... minutes , and each minute into 60 equal parts cal- ed seconds , and these into thirds , fourths , & c . these parts being greater or less as the radius is . 17. A chord is a right line drawn from one end of an arc or arch ( that is ...
Página 82
... minutes . From the centre , to 60 degrees , the line of sines is divided like the line of tangents ; from 60 to 70 , it is divided only to every degree ; from 70 to 80 , to every two degrees ; from 80 to 90 , the division must be ...
... minutes . From the centre , to 60 degrees , the line of sines is divided like the line of tangents ; from 60 to 70 , it is divided only to every degree ; from 70 to 80 , to every two degrees ; from 80 to 90 , the division must be ...
Página 97
... minutes or miles . The extent from the brass pin on the scale of meridional parts to any division on that scale , ap- plied to the line of equal parts , will give ( in degrees ) the meridional parts answering to the latitude of that ...
... minutes or miles . The extent from the brass pin on the scale of meridional parts to any division on that scale , ap- plied to the line of equal parts , will give ( in degrees ) the meridional parts answering to the latitude of that ...
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Términos y frases comunes
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
Pasajes populares
Página 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.
Página 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.
Página 197 - RULE. From half the sum of the three sides subtract each side severally.
Página 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.
Página 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.