A Manual of the Protracting Trigonometer: With Its Application to Rectilinear Draughting and Plotting, Trigonometry, and SurveyingSheldon, 1862 - 77 σελίδες |
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Σελίδα 13
... drawn to a certain point within the figure are equal to each other ; and this point is called the center of the circle . Thus ABE , Fig . 1. , is a circle ; of which F is the center , ABCDE the circumference ; and each of the straight ...
... drawn to a certain point within the figure are equal to each other ; and this point is called the center of the circle . Thus ABE , Fig . 1. , is a circle ; of which F is the center , ABCDE the circumference ; and each of the straight ...
Σελίδα 25
... drawn across the plates , at right angles , and near their center , fine , straight lines , ad , ad , called ADJUSTING LINES . These are for guiding the Rule in squaring the plates . DIRECTIONS FOR USING THE TRIGONOMETER . ( 14 ...
... drawn across the plates , at right angles , and near their center , fine , straight lines , ad , ad , called ADJUSTING LINES . These are for guiding the Rule in squaring the plates . DIRECTIONS FOR USING THE TRIGONOMETER . ( 14 ...
Σελίδα 26
... drawn by either edge of the Rule are MERIDIANS . And if the instru- ment be placed in contact with the East or West sides of the board , all lines drawn by either edge of the Rule are PAR- ALLELS of Latitude . ANGLES OF ELEVATION AND ...
... drawn by either edge of the Rule are MERIDIANS . And if the instru- ment be placed in contact with the East or West sides of the board , all lines drawn by either edge of the Rule are PAR- ALLELS of Latitude . ANGLES OF ELEVATION AND ...
Σελίδα 28
... drawn by the Rule will be horizontal lines . And , when the instrument is considered set at 90 ° , and brought in contact with the East or West sides of the Board ; all lines drawn by the Rule will be vertical lines . Angles of ...
... drawn by the Rule will be horizontal lines . And , when the instrument is considered set at 90 ° , and brought in contact with the East or West sides of the Board ; all lines drawn by the Rule will be vertical lines . Angles of ...
Σελίδα 29
... draw- ing paper attached to the Draughting Board . But if none of the scales will produce the right dimensions , then multiply or divide the several given distances by any con- venient integral or fractional number , as 2 , 10 , 100 ; 2 ...
... draw- ing paper attached to the Draughting Board . But if none of the scales will produce the right dimensions , then multiply or divide the several given distances by any con- venient integral or fractional number , as 2 , 10 , 100 ; 2 ...
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A Manual of the Protracting Trigonometer: With Its Application to ... Josiah Lyman Δεν υπάρχει διαθέσιμη προεπισκόπηση - 2018 |
A Manual Of The Protracting Trigonometer: With Its Application To ... Josiah Lyman Δεν υπάρχει διαθέσιμη προεπισκόπηση - 2023 |
A Manual Of The Protracting Trigonometer: With Its Application To ... Josiah Lyman Δεν υπάρχει διαθέσιμη προεπισκόπηση - 2023 |
Συχνά εμφανιζόμενοι όροι και φράσεις
10th side accuracy acres adjacent angle adjusting lines angles and distances angular point assumed point base Brass Instruments carry the zero centimetres clamped coincide convenient corresponding courses and distances degrees divide twice divisor Double Longitude Draughting Board East or West edge EF² equal error find the angles following courses following example GABF German silver given angle given area given distance given side Given the following hypothenuse indefinite length India Ink instrument Latitude Meridian line running Longitude column method middle side North or South obtained operation opposite paper parallel of latitude parallelogram pencil perpendicular plate Plot the field PROBLEM Protractor Vernier required side right angles scale Scale-Plate sliding square chains subtract survey surveyor three adjacent sides tract of land Trapezium trapezoid unconnected ends unit grooves unit line Vernier Guide Yale College zero grooves
Δημοφιλή αποσπάσματα
Σελίδα 14 - The circumference of every circle is supposed to be divided into 360 equal parts, called degrees ; each degree into 60 equal parts, called minutes ; and each minute into 60 equal parts, called seconds.
Σελίδα 55 - To find the area of a trapezoid. RULE. Multiply half the sum of the two parallel sides "by the perpendicular distance between them : the product will be the area.
Σελίδα 15 - After remarking that the mathematician positively knows that the sum of the three angles of a triangle is equal to two right angles...
Σελίδα 68 - AC 16.25 ch., and the distance of a point P in the side AB, from the angle A 8.50 ch. ; it is required to find the distance AG of a point G in the line AC, so that a line drawn from P to G may cut off a triangle APG containing 3 acres. Ans. 9.25 ch. PROBLEM VIII. The area and base of a triangle being given, to cut off a triangle containing a given area by a line running parallel to one of the sides.
Σελίδα 13 - The diameter of a circle is a straight line passing through its center and terminated at both ends by the circumference.
Σελίδα 73 - B sin 6 2. Given the bearings of three adjacent sides of a tract of land, and the length of the middle side, to cut off, by a line running a given course, a trapezium of a given area.
Σελίδα 67 - Аь the rectangle of the given side and sine of the given angle, Is to twice the given area ; So is radius, To the other side adjacent to the given angle. Then having two sides and the included angle given, the other angles and side, if required, may be found by trig...
Σελίδα 15 - All the meridians passing through a survey of moderate extent, are considered as straight lines parallel to each other. The bearing or course of a line is the angle which it makes with a meridian passing through one end ; and it is reckoned from the north or south point of the horizon, toward the east or west. Thus, if NS represent a meridian, and the angle NAB is 40°, then the bearing of AB from the point A is 40° to the west of north, and is written N. 40° W., and read north forty degrees west....
Σελίδα 73 - To the square of the ordinate add f of the square of the abscissa, and twice the square root of the sum will be the length of the curve required.
Σελίδα 15 - В = 36° 43' ..... log. 9.776598 sum. • CASE II. 5. Wben two sides and the included angle are given, the solution may be effected by means of propositions 3 and 4. Thus, take the given angle from 180° ; the remainder will be the sum of the other two angles. Then, by proposition 3, — As the sum of the given sides is to their difference, So is the tangent of half the sum of the remaining angles to the tangent of half their difference. Half the sum of the remaining angles added to half their difference...