The Theory and Practice of Surveying: Containing All the Instructions Requisite for the Skilful Practice of this ArtE. Duyckinck, 1811 - 508 من الصفحات |
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الصفحة 2
... called the denominator ; and if we chuse to take any number of such parts less than the whole , this is called the numerator of a fraction . The numerator , in the vulgar form , is always written over the denominator , and these are ...
... called the denominator ; and if we chuse to take any number of such parts less than the whole , this is called the numerator of a fraction . The numerator , in the vulgar form , is always written over the denominator , and these are ...
الصفحة 16
... called the root , or first power of this number ; and its other powers are the pro- ducts , that result from multiplying the number by itself , and the last product by the same num- ber again ; and so on to any number of multipli ...
... called the root , or first power of this number ; and its other powers are the pro- ducts , that result from multiplying the number by itself , and the last product by the same num- ber again ; and so on to any number of multipli ...
الصفحة 17
... called surd , or irra- tional roots . • Roots are usually represented by these charac- ters or exponents ; ✓ , or which significs the square root ; thus , ✓ 9 , or 94 = 3 ÷ or cube root ; , orbiquadrate root ; 364 , or 643 = 4 16 , or ...
... called surd , or irra- tional roots . • Roots are usually represented by these charac- ters or exponents ; ✓ , or which significs the square root ; thus , ✓ 9 , or 94 = 3 ÷ or cube root ; , orbiquadrate root ; 364 , or 643 = 4 16 , or ...
الصفحة 20
... root , shall come nearest to the given number , whether greater or less ; and let that number be called the assumed root , and when thus involved , the assumed power , Let the given power , or number be repre- G. 20 EVOLUTION .
... root , shall come nearest to the given number , whether greater or less ; and let that number be called the assumed root , and when thus involved , the assumed power , Let the given power , or number be repre- G. 20 EVOLUTION .
الصفحة 24
... called the Index ; and the fractional part will be called the Logarithm . The computation of these fractional parts , is called making Loga- rithms ; and the most troublesome part of this work is to make the Logarithms of Prime Num ...
... called the Index ; and the fractional part will be called the Logarithm . The computation of these fractional parts , is called making Loga- rithms ; and the most troublesome part of this work is to make the Logarithms of Prime Num ...
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عبارات ومصطلحات مألوفة
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
مقاطع مشهورة
الصفحة 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.
الصفحة 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.
الصفحة 197 - RULE. From half the sum of the three sides subtract each side severally.
الصفحة 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.
الصفحة 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.