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 σελίδες |
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Σελίδα
... Attraction , 198 211 Variation , To find the variation of compass by an amplitude , To find the variation of compass by an azimuth , To enlarge or diminish Maps , 215 217 219 221 ERRATA . Page 57 , Divide 59.45 log . = To Survey with ...
... Attraction , 198 211 Variation , To find the variation of compass by an amplitude , To find the variation of compass by an azimuth , To enlarge or diminish Maps , 215 217 219 221 ERRATA . Page 57 , Divide 59.45 log . = To Survey with ...
Σελίδα 210
... advan- tage of two decimal figures in the difference of latitude and departure , in working the traverse table ; therefore the first method is preferable . OF ATTRACTION . IT sometimes happens , that the needle 210 OF INTERSECTIONS .
... advan- tage of two decimal figures in the difference of latitude and departure , in working the traverse table ; therefore the first method is preferable . OF ATTRACTION . IT sometimes happens , that the needle 210 OF INTERSECTIONS .
Σελίδα 211
... ATTRACTION . IT sometimes happens , that the needle is attracted out of its customary position , by an unknown cause ; but most probably owing to some matter near the surface of the earth : as it is frequently observable where there is ...
... ATTRACTION . IT sometimes happens , that the needle is attracted out of its customary position , by an unknown cause ; but most probably owing to some matter near the surface of the earth : as it is frequently observable where there is ...
Σελίδα 212
... attracted 24 degrees westerly ; then turning the sights to B , it bears N. 40 ° W. to this , add the attraction 21 degrees , and it gives the true bearing N. 43 ° W. distance measured is 7 chains , 20 links . Then , by a back - sight ...
... attracted 24 degrees westerly ; then turning the sights to B , it bears N. 40 ° W. to this , add the attraction 21 degrees , and it gives the true bearing N. 43 ° W. distance measured is 7 chains , 20 links . Then , by a back - sight ...
Σελίδα 213
... attraction being abated , makes it a due north course , & chains , 10 links ; then , by a back - sight , C bears from D , S. 4 ° W. Hence the north point here is attracted 4 degrees wester- ly ; then turning the sights to E , it bears S ...
... attraction being abated , makes it a due north course , & chains , 10 links ; then , by a back - sight , C bears from D , S. 4 ° W. Hence the north point here is attracted 4 degrees wester- ly ; then turning the sights to E , it bears S ...
Άλλες εκδόσεις - Προβολή όλων
A Compendious System of Practical Surveying, and Dividing of Land: Concisely ... Πλήρης προβολή - 1814 |
A Compendious System of Practical Surveying, and Dividing of Land: Concisely ... Πλήρης προβολή - 1814 |
A Compendious System of Practical Surveying, and Dividing of Land: Concisely ... Zachariah Jess Δεν υπάρχει διαθέσιμη προεπισκόπηση - 2023 |
Συχνά εμφανιζόμενοι όροι και φράσεις
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
Δημοφιλή αποσπάσματα
Σελίδα 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...
Σελίδα 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.
Σελίδα 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.
Σελίδα 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...
Σελίδα 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.
Σελίδα 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...
Σελίδα 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....
Σελίδα 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.
Σελίδα 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.
Σελίδα 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...