Elements of Surveying with a Description of the Instruments and the Necessary Tables Including a Table of Natural Sines |
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Page 12
... suppose the negative sign to belong to the whole logarithm , when in fact it belongs only to the characteristic , we place the sign above the characte ristic , thus , EXAMPLES . is log 2756 log 3270 log 287.965 log log 08 = 1.903090 ...
... suppose the negative sign to belong to the whole logarithm , when in fact it belongs only to the characteristic , we place the sign above the characte ristic , thus , EXAMPLES . is log 2756 log 3270 log 287.965 log log 08 = 1.903090 ...
Page 30
... correspond to the unit of the scale . 33. Suppose that the given line were 75 feet in length , and it were required to draw it on paper , on a scale of 25 feet to The length of the line 75 feet , being divided the inch . 30 INTRODUCTION .
... correspond to the unit of the scale . 33. Suppose that the given line were 75 feet in length , and it were required to draw it on paper , on a scale of 25 feet to The length of the line 75 feet , being divided the inch . 30 INTRODUCTION .
Page 31
... suppose half an inch ) , how many parts are to be taken ? Ans . ( 5.25 , parts , or 2.625 inches . REMARK II . When the length of a line is given on the paper , and it is required to find the true length of the line which it represents ...
... suppose half an inch ) , how many parts are to be taken ? Ans . ( 5.25 , parts , or 2.625 inches . REMARK II . When the length of a line is given on the paper , and it is required to find the true length of the line which it represents ...
Page 32
... suppose the length of a line drawn on the paper was found to be 3.56 inches , the scale being 40 feet to the inch : then , 3.55 X 40 142 feet , the length of the line . PROBLEM VIII . Having given two sides and the included angle of a ...
... suppose the length of a line drawn on the paper was found to be 3.56 inches , the scale being 40 feet to the inch : then , 3.55 X 40 142 feet , the length of the line . PROBLEM VIII . Having given two sides and the included angle of a ...
Page 33
... suppose is opposite the side B. Draw the indefinite line DF and make the angle FDH equal to the angle C : take DH - A , from the AH BH D H point H , as a centre , with a radius equal to the other given side B , describe an arc cutting ...
... suppose is opposite the side B. Draw the indefinite line DF and make the angle FDH equal to the angle C : take DH - A , from the AH BH D H point H , as a centre , with a radius equal to the other given side B , describe an arc cutting ...
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