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 x
... GROOVES . ( 10 ) FIRST METHOD OF READING AND MEASURING . ( 11 ) DRAUGHTING BOARD .. 17 18 18 19 23 SECOND METHOD OF READING AND MEASURING .. 23 23 25 DIRECTIONS FOR USING THE TRIGONOMETER . Art . ( 14 ) ADJUSTMENT OF THE TRIGONOMETER ...
... GROOVES . ( 10 ) FIRST METHOD OF READING AND MEASURING . ( 11 ) DRAUGHTING BOARD .. 17 18 18 19 23 SECOND METHOD OF READING AND MEASURING .. 23 23 25 DIRECTIONS FOR USING THE TRIGONOMETER . Art . ( 14 ) ADJUSTMENT OF THE TRIGONOMETER ...
Σελίδα 19
... GROOVE , close to the unit line ; the two constituting a pair , or set , called unit grooves . On each side of the Attached Guide there are also six other sets of grooves like the former , called zero grooves . And when the guides are ...
... GROOVE , close to the unit line ; the two constituting a pair , or set , called unit grooves . On each side of the Attached Guide there are also six other sets of grooves like the former , called zero grooves . And when the guides are ...
Σελίδα 22
... grooves is to give greater available length to. 2 Or ur - FIG . 8 . 1 3 3 5 20 . 6 7 9 10 Ft . 1 2 3 하 2 1 20 / - 27 1 2 3 4 5 6 ケ 8 1,2 13 1/4 15 1,6 17 20 21 22 24 Aμ- Ꮮ Scale - Plate with the " Mixed System . " 22 [ SEC . I. THE ...
... grooves is to give greater available length to. 2 Or ur - FIG . 8 . 1 3 3 5 20 . 6 7 9 10 Ft . 1 2 3 하 2 1 20 / - 27 1 2 3 4 5 6 ケ 8 1,2 13 1/4 15 1,6 17 20 21 22 24 Aμ- Ꮮ Scale - Plate with the " Mixed System . " 22 [ SEC . I. THE ...
Σελίδα 23
... grooves is to give greater available length to the Scale - Plate in extreme cases . These explanations may be illustrated by the annexed en- gravings . Fig . 6 , p . 20 , shows the guides in contact . Fig . 7 , p . 21 , shows them apart ...
... grooves is to give greater available length to the Scale - Plate in extreme cases . These explanations may be illustrated by the annexed en- gravings . Fig . 6 , p . 20 , shows the guides in contact . Fig . 7 , p . 21 , shows them apart ...
Σελίδα 30
... grooves of the guides brought to coincide with the same points . The angle is then read off on the Protractor , and the distance on the Scale - Plate . Whenever it is required to measure an angle or a distance separately , the ...
... grooves of the guides brought to coincide with the same points . The angle is then read off on the Protractor , and the distance on the Scale - Plate . Whenever it is required to measure an angle or a distance separately , the ...
Άλλες εκδόσεις - Προβολή όλων
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...