A Treatise on the Principles and Practice of Levelling: Showing Its Application to Purposes of Railway Engineering and the Construction of Roads, &cVan Nostrand, 1870 - 157 pages |
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Page 75
... hypothenuse of a right - angled triangle , of which the perpendicular is the difference of level . It scarce- ly appears necessary to give the rule for the calcula- tion , but for the sake of uniformity we shall do so . † Add together ...
... hypothenuse of a right - angled triangle , of which the perpendicular is the difference of level . It scarce- ly appears necessary to give the rule for the calcula- tion , but for the sake of uniformity we shall do so . † Add together ...
Page 76
... hypothenuse of a right- angled triangle , the operation of levelling may be car- ried on with great rapidity , but , it must be remarked , without pretensions to great accuracy ; in fact , in that particular , the use of the spirit ...
... hypothenuse of a right- angled triangle , the operation of levelling may be car- ried on with great rapidity , but , it must be remarked , without pretensions to great accuracy ; in fact , in that particular , the use of the spirit ...
Page 116
... hypothenuse A C measured 1240 links . " I state the calculation thus : 2nd , Sine of 6 ° 1st , Hypothenuse 1240 2.112657 = log 129 , the perp ' . 9.019235 = 3.093422 3rd , Cosine of 6 ° = 9.997614 3.091036 = log 1233 , the base . Answer ...
... hypothenuse A C measured 1240 links . " I state the calculation thus : 2nd , Sine of 6 ° 1st , Hypothenuse 1240 2.112657 = log 129 , the perp ' . 9.019235 = 3.093422 3rd , Cosine of 6 ° = 9.997614 3.091036 = log 1233 , the base . Answer ...
Page 116
... hypothenuse AC measured 1240 links . “ I state the calculation thus : 2 . 112657 = log 1297 % the perp " . 2nd , Sine of 6° 9 . 019235 1st , Hypothenuse 1240 = 3 . 093422 3rd , Cosine of 6° 9 . 997614 3 . 091036 = log 1233 % the base ...
... hypothenuse AC measured 1240 links . “ I state the calculation thus : 2 . 112657 = log 1297 % the perp " . 2nd , Sine of 6° 9 . 019235 1st , Hypothenuse 1240 = 3 . 093422 3rd , Cosine of 6° 9 . 997614 3 . 091036 = log 1233 % the base ...
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Common terms and phrases
a₁ adjustment application approximate point b₁ back sight back staff bench mark Bridge calculations centre line centre stake chain Civil Engineer clinometer Cloth column computed half width construction correct cross wires curvature curve cuttings and embankments datum line depth of cutting determined diagram difference of level direction distance Dover Castle Drawing Dumpy Level earth edition engravings equal example feet Folkstone foot fore sight formula forward reading forward station give ground Guns Gunter's chain horizontal line hypothenuse Hypsometry Illustrated inches inclination inclined plane instrument Iron J. P. WHITNEY John Macneill length line A B lines of railway mean height measured method middle area miles object glass observation obtain parallax perpendicular placed quantity radius reduced levels represent result road side slope spirit-level Steam stones STRENGTH OF MATERIALS subtracted superelevation Survey surveyor Tables tangent telescope theodolite tion U. S. Navy Water wood-cuts
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