The Theory and Practice of Surveying: Containing All the Instructions Requisite for the Skilful Practice of this Art |
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Page 99
... ; 3. the angles formed by the planes , in which these lines are drawn , or are supposed to be traced . On the comparison of these three objects , 9877454 depends the solution of all questions , that can be TRIGONOMETRY . 99.
... ; 3. the angles formed by the planes , in which these lines are drawn , or are supposed to be traced . On the comparison of these three objects , 9877454 depends the solution of all questions , that can be TRIGONOMETRY . 99.
Page 100
... object of what is called Plane Trigonometry , because the six parts , consid- ered here , are in the same plane : it is also denomi- nated Rectilineal Trigonometry . The second quest- ion belongs to SphericalTrigonometry , wherein the ...
... object of what is called Plane Trigonometry , because the six parts , consid- ered here , are in the same plane : it is also denomi- nated Rectilineal Trigonometry . The second quest- ion belongs to SphericalTrigonometry , wherein the ...
Page 135
... object fixed in the extreme point of the line to be measured ; this is a direction for the hinder chain- man to govern the foremost one by , in order that the distance may be measured in a right line ; for if the hinder chainman causes ...
... object fixed in the extreme point of the line to be measured ; this is a direction for the hinder chain- man to govern the foremost one by , in order that the distance may be measured in a right line ; for if the hinder chainman causes ...
Page 135
... object at the termination of the line , as before : so that , the number of pegs taken up by the hinder chainman , expresses the number of chains ; to which , if the odd links be annexed , the distance line required in chains and links ...
... object at the termination of the line , as before : so that , the number of pegs taken up by the hinder chainman , expresses the number of chains ; to which , if the odd links be annexed , the distance line required in chains and links ...
Page 136
... object at the termination of the line , as before : so that , the number of pegs taken up by the hinder chainman , expresses the number of chains ; to which , if the odd links be annexed , the distance line required in chains and links ...
... object at the termination of the line , as before : so that , the number of pegs taken up by the hinder chainman , expresses the number of chains ; to which , if the odd links be annexed , the distance line required in chains and links ...
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Common terms and phrases
acres altitude Answer arch azimuth base bearing blank line centre chains and links chord circle circumferentor Co-sec Co-tang column compasses contained decimal difference distance line divided divisions draw east Ecliptic edge feet field-book figures fore four-pole chains geom given number half the sum Horizon glass hypothenuse inches instrument Lat Dep Lat latitude length logarithm measure meridian distance multiplied natural co-sine natural sine needle Nonius number of degrees object observed off-sets opposite parallel parallelogram pegs perches perpendicular plane pole pole star Portmarnock PROB protractor Quadrant quotient radius right angles right line scale of equal SCHOLIUM screw Secant sect Sextant side sights square station stationary distance subtract Sun's survey taken Tang tangent theo theodolite trapezium triangle ABC trigonometry two-pole chains vane versed sine vulgar fraction whence
Popular passages
Page 38 - The angle in a semicircle is a right angle ; the angle in a segment greater than a semicircle is less than a right angle ; and the angle in a segment less than a semicircle is greater than a right angle.
Page 25 - 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, &c.
Page 197 - RULE. From half the sum of the three sides subtract each side severally.
Page 106 - C' (89) (90) (91) (92) (93) 112. In any plane triangle, the sum of any two sides is to their difference as the tangent of half the sum of the opposite angles is to the tangent of half their difference.
Page 27 - The VERSED SINE of an arc is that part of the diameter which is between the sine and the arc. Thus BA is the versed sine of the arc AG.