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 páginas |
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Página 15
... inclinations , which the undulations of the ground admit of being introduced , are suitable for the purpose either of a railway or turnpike road . And if the ob- ject be the formation of a canal , the section must show what extent of ...
... inclinations , which the undulations of the ground admit of being introduced , are suitable for the purpose either of a railway or turnpike road . And if the ob- ject be the formation of a canal , the section must show what extent of ...
Página 74
... inclination changes , without regard to the minor inequalities of the surface , taking care that the adjustments have been carefully examined and recti- fied , as explained in the book above alluded to , espe- cially those adjustments ...
... inclination changes , without regard to the minor inequalities of the surface , taking care that the adjustments have been carefully examined and recti- fied , as explained in the book above alluded to , espe- cially those adjustments ...
Página 76
... inclination , and sent a man on with a staff , as above described ; and whilst the observer was looking through the telescope , anoth- er assistant walked along the line , holding up another staff at every rise and hollow of the ...
... inclination , and sent a man on with a staff , as above described ; and whilst the observer was looking through the telescope , anoth- er assistant walked along the line , holding up another staff at every rise and hollow of the ...
Página 79
... inclinations on the latter may be made greater and more variable , being worked by animal power , which is capable of ... inclination which presents no difficulty to fast driving either in ascending or descending . But on a line of ...
... inclinations on the latter may be made greater and more variable , being worked by animal power , which is capable of ... inclination which presents no difficulty to fast driving either in ascending or descending . But on a line of ...
Página 80
... inclination , or gradient , as it is called , * should exceed 20 feet in a mile , or 1 in 264. To draw the lines of proposed surface ( or gradients ) upon a sec- tion , which shall be the most suitable for the purposes intended , and at ...
... inclination , or gradient , as it is called , * should exceed 20 feet in a mile , or 1 in 264. To draw the lines of proposed surface ( or gradients ) upon a sec- tion , which shall be the most suitable for the purposes intended , and at ...
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Términos y frases comunes
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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