A Compendious System of Practical Surveying, and Dividing of Land: Concisely Defined, Methodically Arranged, and Fully Exemplified : the Whole Adapted for the Easy and Regular Instruction of Youth, in Our American SchoolsJohnson and Warner, 1814 - 227 páginas |
Dentro del libro
Resultados 1-5 de 59
Página
... Note . These two examples prove each other . Perhaps some may object to the uniform mode I have adopted , in finding the meridian distances . I know that some use other methods ; but I apprehend there is none more easy , than the one I ...
... Note . These two examples prove each other . Perhaps some may object to the uniform mode I have adopted , in finding the meridian distances . I know that some use other methods ; but I apprehend there is none more easy , than the one I ...
Página
... Notes , 80 90 100 102 120 Tables of angles , & c . with the meridian , 127 Compass , 128 To find the Content of Land , by Calculation , 129 Demonstration , 137 To make a Map from Difference of Lat . and Dep . 140 Inaccessible Boundary ...
... Notes , 80 90 100 102 120 Tables of angles , & c . with the meridian , 127 Compass , 128 To find the Content of Land , by Calculation , 129 Demonstration , 137 To make a Map from Difference of Lat . and Dep . 140 Inaccessible Boundary ...
Página 23
... A describe an arch from the line AB , and from that line lay 42 ° 30 ' on the arch to D ; then through the point D , draw AC , and it is done . C B 42 ° 30 ' B Note . To measure an angle , take the chord GEOMETRICAL PROBLEMS . 23.
... A describe an arch from the line AB , and from that line lay 42 ° 30 ' on the arch to D ; then through the point D , draw AC , and it is done . C B 42 ° 30 ' B Note . To measure an angle , take the chord GEOMETRICAL PROBLEMS . 23.
Página 24
... Note . To measure an angle , take the chord of 60 ° in the compasses , and with one foot in the angular point , make an arch from line to line ; then take the arch in the compasses , apply it to the chord , which will shew the degrees ...
... Note . To measure an angle , take the chord of 60 ° in the compasses , and with one foot in the angular point , make an arch from line to line ; then take the arch in the compasses , apply it to the chord , which will shew the degrees ...
Página 27
... the chord of 60 degrees , ( by , the note to Problem 8 ) will be 27 ° 23 ′ ; con- sequently the other angle 62 ° 37 ′ , by position 2 , page 10 . A 150 69 B PROBLEM XIII . The legs given , to find the GEOMETRICAL PROBLEMS . 27.
... the chord of 60 degrees , ( by , the note to Problem 8 ) will be 27 ° 23 ′ ; con- sequently the other angle 62 ° 37 ′ , by position 2 , page 10 . A 150 69 B PROBLEM XIII . The legs given , to find the GEOMETRICAL PROBLEMS . 27.
Otras ediciones - Ver todas
A Compendious System of Practical Surveying, and Dividing of Land: Concisely ... Vista completa - 1814 |
A Compendious System of Practical Surveying, and Dividing of Land: Concisely ... Vista completa - 1814 |
A Compendious System of Practical Surveying, and Dividing of Land: Concisely ... Zachariah Jess Sin vista previa disponible - 2023 |
Términos y frases comunes
180 degrees 40 perches ABCD acres angle opposite Artificial Sines base BC bearing and distance centre chains chord of 60 circle Co-sec Co-sine Co-tang Tang compasses decimal Deg Dist DegDegDeg describe an arch diameter diff difference of latitude divided division line double area East EXAMPLE extent will reach feet find the angles find the area find the bearing find the Content find the difference find the hypothenuse find the logarithm following figure foot half the sum hypothenuse 121 hypothenuse AC intersect latitude and departure left hand line of numbers line of sines Meridian Distance Multiply North Oblique Angled Trigonometry off-sets opposite angle parallelogram perpen perpendicular BC piece of ground PROBLEM quotient radius 90 Rhombus right angled triangle Right Angled Trigonometry RULE scale of equal Secant side BC South square perches square root Stations Bearings subtracted survey tangent Trapezium West
Pasajes populares
Página 50 - ЙО, 30, &c., to the left hand, where it ends at 87 degrees. This line. with the line of equal parts, marked (EP), under it, are used together, and only in Mercator's Sailing. The upper line contains the degrees of the meridian, or latitude in a Mercator's chart, corresponding to the degrees of longitude on the lower line. The use of this Scale in solving the usual problems of Trigonometry...
Página 80 - To the length of the given side ; So is the sine of the angle opposite the required side. To the length of the required side.
Página 4 - 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, etc.
Página 44 - I tenth part ; and the next 2, 2 tenth parts; and 10 at the end will be but one whole number or integer. As the figures are increased or diminished in their value, so in like manner must all the intermediate strokes or subdivisions be increased or diminished ; that is, if the first...
Página 47 - EXAMPLE. If the diameter of a circle be 7 inches, and the circumference 22, what is the circumference of another circle, the diameter of which is 14 inches ? Extend from 7 to 22, that extent will reach from 14 to 44 the same way.
Página 217 - Then if the true and magnetic amplitudes be both north or both south their difference is the variation, but if one be north and the other south their sum is the variation ; and to know whether it be easterly or westerly, suppose the observer looking towards that point of the compass representing the magnetic amplitude; then if the true amplitude be to the...
Página 220 - Ъои) on the east, or both on the west side of the meridian, their difference is the variation : but if one be on the east, and the other on the west side of the meridian, their sum is the variation ; and to know if it be east or west, suppose the observer looking towards that point of the compass representing the magnetic azimuth ; then if the true •azimuth be to the right of the magnetic, the variation is east, but if the true be to the left of the magnetic, the variation is west. EXAMPLE....
Página 215 - As the length of the whole line, Is to 57.3 Degrees,* So is the said distance, To the difference of Variation required. EXAMPLE. Suppose it be required to run a line which some years ago bore N.
Página 219 - . 2. Subtract the Sun's declination from 90«, when the latitude and declination are of the same name, or add it to 90*, when they are of contrary names ; and the sum, or remainder, will be the Sun's polar distance. , 3. Add together the Sun's polar distance, the latitude of the place, and the altitude of the Sun; take the difference between half their sum and the polar distance, and note the remainder.
Página 49 - ... degrees of the quadrant, begins at the right hand against 90° on the sines, and from thence is numbered towards the left hand thus : 10, 20...