Elements of Surveying with a Description of the Instruments and the Necessary Tables Including a Table of Natural Sines |
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Page 37
... horizontal lines of each page , are written the degrees whose sines ... horizontal line of the different pages : then descend along the column of minutes , on the left of the page , till ... PLANE TRIGONOMETRY , 37 Table of Logarithmic Sines,
... horizontal lines of each page , are written the degrees whose sines ... horizontal line of the different pages : then descend along the column of minutes , on the left of the page , till ... PLANE TRIGONOMETRY , 37 Table of Logarithmic Sines,
Page 51
... , and is called a horizontal plane . All planes parallel to such a plane , are also called horizontal planes . 71. A plane which is perpendicular to a horizontal plane 72. All lines of a horizontal plane , and all is called a vertical plane ...
... , and is called a horizontal plane . All planes parallel to such a plane , are also called horizontal planes . 71. A plane which is perpendicular to a horizontal plane 72. All lines of a horizontal plane , and all is called a vertical plane ...
Page 52
... horizontal lines . 73. Lines which are perpendicular to a horizontal plane , are called vertical lines ; and all ... horizontal distance be- tween two points , is the horizontal line intercepted between the two vertical lines passing ...
... horizontal lines . 73. Lines which are perpendicular to a horizontal plane , are called vertical lines ; and all ... horizontal distance be- tween two points , is the horizontal line intercepted between the two vertical lines passing ...
Page 55
... horizontal distance between the stations . A For example , in measuring the horizontal distance between and C , we ... plane of its base horizontal . This ball , which is hollow , is firmly connected with the smaller base of of the plate ...
... horizontal distance between the stations . A For example , in measuring the horizontal distance between and C , we ... plane of its base horizontal . This ball , which is hollow , is firmly connected with the smaller base of of the plate ...
Page 62
... horizontal axis and the line of collimation , these lines may be adjusted at ... horizontal , or per- pendicular to the axis of the instrument ; and this is ... plane passed through the line of collimation , with the vernier plate . It ...
... horizontal axis and the line of collimation , these lines may be adjusted at ... horizontal , or per- pendicular to the axis of the instrument ; and this is ... plane passed through the line of collimation , with the vernier plate . It ...
Common terms and phrases
acres adjusted angle of elevation axis azimuth back-sights base line called centre clamp-screw coincide column comp compass Cosine D Cosine Sine Cotang course curve decimal degrees determined difference of level direction divided double meridian distance draw east elongation error example feet field notes figure given angle given line given point ground Gunter's chain half hence horizontal angle horizontal distance horizontal plane hypothenuse inches instrument intersection latitude and departure length levelling screws line AC line of collimation logarithm M.
M. Sine marked measure method multiplied natural sines needle object paper parallel passing perpendicular piece of land pins plane of reference protractor radius right angles right-angled triangle rods scale of equal secant side similar triangles spider's lines square chains staff subtract surface survey Tang tangent theodolite true meridian vernier plate vertical limb yards