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 vii
... lay down angles and lines with an exactness limited only by the nicety of the graduation , and of the ad- justments , which latter seem to be quite under your control . The former of course must depend upon the artist , whom I should ...
... lay down angles and lines with an exactness limited only by the nicety of the graduation , and of the ad- justments , which latter seem to be quite under your control . The former of course must depend upon the artist , whom I should ...
Σελίδα viii
... laid down , with an accuracy far surpassing that attainable with any other instrument I have ever seen . It is so perfect in its work that areas may be obtained mechanically by it , with as much satisfaction as by the use of the ...
... laid down , with an accuracy far surpassing that attainable with any other instrument I have ever seen . It is so perfect in its work that areas may be obtained mechanically by it , with as much satisfaction as by the use of the ...
Σελίδα 27
... laid down , with EITHER FACE of the instrument UPWARD , as the case may require . Cases will occasionally occur in which this facility of the instrument will be found a great convenience . ( 18. ) VERNIERS . The Verniers both of the ...
... laid down , with EITHER FACE of the instrument UPWARD , as the case may require . Cases will occasionally occur in which this facility of the instrument will be found a great convenience . ( 18. ) VERNIERS . The Verniers both of the ...
Σελίδα 30
... laid down , the operation is REVERSED in the following manner , viz . : With the base of the instrument in contact with the border of the table , the Rule is brought to coincide with the given . points on the paper ; and the Protractor ...
... laid down , the operation is REVERSED in the following manner , viz . : With the base of the instrument in contact with the border of the table , the Rule is brought to coincide with the given . points on the paper ; and the Protractor ...
Σελίδα 31
... lay it down with the Trigonometer in its usual or normal position . Then calling the letter E , on the Protractor limb , West , the letter W , East , and setting the vernier at PREPARING 31 THE PAPER , ETC. (25) USE OF DOTS แ (26) ...
... lay it down with the Trigonometer in its usual or normal position . Then calling the letter E , on the Protractor limb , West , the letter W , East , and setting the vernier at PREPARING 31 THE PAPER , ETC. (25) USE OF DOTS แ (26) ...
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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...