An elementary course of practical mathematics, Parte31851 |
Dentro del libro
Resultados 1-5 de 11
Página 227
... confidence , recommend it as admirably adapted to promote its object . " - Christian Witness . EDINBURGH : SUTHERLAND AND KNOX . LONDON : SIMPKIN , MARSHALL AND CO . AN ELEMENTARY COURSE OF PRACTICAL MATHEMATICS , FOR THE USE.
... confidence , recommend it as admirably adapted to promote its object . " - Christian Witness . EDINBURGH : SUTHERLAND AND KNOX . LONDON : SIMPKIN , MARSHALL AND CO . AN ELEMENTARY COURSE OF PRACTICAL MATHEMATICS , FOR THE USE.
Página 235
... object of logarithms is to facilitate such operations . They were first employed systematically for that purpose by Baron Napier of Mer- chiston , who , after trying other ingenious devices , at last happily discovered this useful ...
... object of logarithms is to facilitate such operations . They were first employed systematically for that purpose by Baron Napier of Mer- chiston , who , after trying other ingenious devices , at last happily discovered this useful ...
Página 289
... object above or below the horizon , or the angular distance of any two such objects from each other , the point of ob- servation being taken as the centre or angular point . For the sake of perspicuity it is proper to explain here ...
... object above or below the horizon , or the angular distance of any two such objects from each other , the point of ob- servation being taken as the centre or angular point . For the sake of perspicuity it is proper to explain here ...
Página 290
... object , and the stem is brought as nearly as possible to an upright position by means of the feet on which it stands ; and , when that is done , a screw acting on the stem brings the spirit level to a horizontal position and completes ...
... object , and the stem is brought as nearly as possible to an upright position by means of the feet on which it stands ; and , when that is done , a screw acting on the stem brings the spirit level to a horizontal position and completes ...
Página 291
... object in the horizon , the index of the vertical semi- circle points to zero . * Again , when the telescope turns from one object to another , both in the horizon , it carries the index - circle round with it , the graduated circle ...
... object in the horizon , the index of the vertical semi- circle points to zero . * Again , when the telescope turns from one object to another , both in the horizon , it carries the index - circle round with it , the graduated circle ...
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.