An elementary course of practical mathematics, Parte31851 |
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Página 232
... COMPASS , VI . DIP OF THE SEA HORIZON , VII . DIP OF THE SEA AT DIFFERENT DISTANCES , 82 81 88 100 · 145 • 146 • 146 · VIII . CORRECTION FOR THE CURVATURE OF THE EARTH , IX . REDUCTION OF OBLIQUE TO HORIZONTAL MEA- 146 SUREMENT , • 146 ...
... COMPASS , VI . DIP OF THE SEA HORIZON , VII . DIP OF THE SEA AT DIFFERENT DISTANCES , 82 81 88 100 · 145 • 146 • 146 · VIII . CORRECTION FOR THE CURVATURE OF THE EARTH , IX . REDUCTION OF OBLIQUE TO HORIZONTAL MEA- 146 SUREMENT , • 146 ...
Página 258
... compasses ; but the sliding rule renders this unnecessary , since the one length is added to the other or subtracted ... compasses from 1 to the smaller of the two factors on the line of Numbers . Keep the dis- tance unaltered in the ...
... compasses ; but the sliding rule renders this unnecessary , since the one length is added to the other or subtracted ... compasses from 1 to the smaller of the two factors on the line of Numbers . Keep the dis- tance unaltered in the ...
Página 259
... compasses on 1 and the right on 7. Remove the compasses without altering the distance , and place the right foot on 63. The left will reach 9 , which is the Answer . COR . The same operation is performed by the Sliding Rule , thus ...
... compasses on 1 and the right on 7. Remove the compasses without altering the distance , and place the right foot on 63. The left will reach 9 , which is the Answer . COR . The same operation is performed by the Sliding Rule , thus ...
Página 260
... compasses on the scale from the first term to the second . The same stretch will reach from the third to the fourth . Or : -Extend the compasses from the first term to the third . That extent will reach from the second to the fourth ...
... compasses on the scale from the first term to the second . The same stretch will reach from the third to the fourth . Or : -Extend the compasses from the first term to the third . That extent will reach from the second to the fourth ...
Página 295
... Compass must be referred to , which will be found delineated in Table v . Its circumference is divided into 32 equal s parts , distinguishing the 32 Points of the Compass , as they are called , -8 in each quadrant : each of 295 OF PLANE ...
... Compass must be referred to , which will be found delineated in Table v . Its circumference is divided into 32 equal s parts , distinguishing the 32 Points of the Compass , as they are called , -8 in each quadrant : each of 295 OF PLANE ...
Términos y frases comunes
angle opposite angles of elevation angular elevation arc BC arithmetical series artificial horizon chains CHAPTER VII ciphers circle column compasses compound interest Compute Cosec Cosine Cotang cube roots decimal point degrees and minutes diagram diameter Divide divisor EDINBURGH EXAMPLE EXERCISES IN CHAPTER extract the square feet figure an integer find the Angles Find the logarithms four figures fourth term geometrical progression given angle given leg given number given side horizontal angles hypothenuse inches instrument LOGARITHMIC SCALES Logarithmic Sine measured miles Multiply NOTE number of degrees object observed opposite the former opposite the latter Perp perpendicular PLANE TRIGONOMETRY Price PROBLEM II PROBLEM VII quadrant quotient radius remove the decimal right-angled triangle Secant sextant side opposite Sliding Rule spirit level square root station Subtract SUTHERLAND AND KNOX Table Tang tangent telescope theodolite third side three figures three sides Treatise versed-sine vertex vertical angle yards
Pasajes populares
Página 282 - TO THEIR DIFFERENCE ; So IS THE TANGENT OF HALF THE SUM OF THE OPPOSITE ANGLES', To THE TANGENT OF HALF THEIR DIFFERENCE.
Página 274 - RULE. — Subtract the square of the base from the square of the hypothenuse, and extract the square root of the remainder.
Página 377 - Key to above 60 3. Complete Practical Treatise on the Nature and Use of Logarithms, and on Plane Trigonometry, with Logarithmic and Trigonometrical Tables, . 5 0 4.
Página 245 - To find, then, by logarithms, the fourth term in a proportion, ADD THE LOGARITHMS OF THE SECOND AND THIRD TERMS, AND from the sum SUBTRACT THE LOGARITHM OF THE FIRST TERM.
Página 279 - From D as a center with a radius equal to a, draw an arc intersecting El in F and F'.
Página 292 - ... the angle of reflection is always equal to the angle of incidence, the image for any point can be seen only in the reflected ray prolonged.
Página 279 - Let abc (fig. 1 14) be a spherical triangle, whose sphere has its centre in o, and unity for radius. If now from c, on the plane aob, we let fall the perpendicular cd; from d on ae, bo, the perpendiculars de, df, and draw ce, cf; it would be easy to show that the triangles ceo, cfo are right angles...
Página 278 - To find a side, work the following proportion: — as the sine of the angle opposite the given side is to the sine of the angle opposite the required side, so is the given side to the required side.
Página 243 - BY LOGARITHMS. RULE. FROM the logarithm of the dividend subtract the logarithm of the divisor, and the number answering to the remainder will be the quotient required.
Página 284 - That is, as the base, is to the sum of the two sides; so is the difference of the sides, to the sum of the segments of the base.