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 3
... ... EXPLANATION OF FIELD - BOOK . 51 REDUCTION OF LEVELS .... 52 TO DRAW THE SECTION . WORKING SECTION .. 57 61 TO DRAW THE SECTION STANDARD LEVELS 66 73 LEVELLING WITH THE THEODOLITE 75 PART III . COMPUTATION OF EARTH - WORK , ROAD.
... ... EXPLANATION OF FIELD - BOOK . 51 REDUCTION OF LEVELS .... 52 TO DRAW THE SECTION . WORKING SECTION .. 57 61 TO DRAW THE SECTION STANDARD LEVELS 66 73 LEVELLING WITH THE THEODOLITE 75 PART III . COMPUTATION OF EARTH - WORK , ROAD.
Página 73
... THEODOLITE . The application of the theodolite to the practice of levelling is an operation of great simplicity . We must suppose the reader to be already acquainted with the construction ON LEVELLING . 73 LEVELLING WITH THE THEODOLITE.
... THEODOLITE . The application of the theodolite to the practice of levelling is an operation of great simplicity . We must suppose the reader to be already acquainted with the construction ON LEVELLING . 73 LEVELLING WITH THE THEODOLITE.
Página 74
... theodolite is seldom employed , except on surveys of great extent upon trigonometrical prin- ciples , as those of the United Kingdom under the di- rection of the Board of Ordnance , where theodolites of 3 feet diameter have been ...
... theodolite is seldom employed , except on surveys of great extent upon trigonometrical prin- ciples , as those of the United Kingdom under the di- rection of the Board of Ordnance , where theodolites of 3 feet diameter have been ...
Página 76
... theodolite to the pur- poses of levelling was introduced by Sir John Macneill . He caused to be constructed , by Messrs . Troughton and Simms , a more powerful instrument for the purpose . It was a combination of the level and the ...
... theodolite to the pur- poses of levelling was introduced by Sir John Macneill . He caused to be constructed , by Messrs . Troughton and Simms , a more powerful instrument for the purpose . It was a combination of the level and the ...
Página 77
... theodolite , will give but a general approximation to the truth , de- pending in a great degree upon the quality of the in- struments , and the care bestowed upon the operation . PART III . COMPUTATION OF EARTH - WORK - ROAD ON ...
... theodolite , will give but a general approximation to the truth , de- pending in a great degree upon the quality of the in- struments , and the care bestowed upon the operation . PART III . COMPUTATION OF EARTH - WORK - ROAD ON ...
Outras edições - Ver tudo
A TREATISE ON THE PRINCIPLES AND PRACTICE OF LEVELLING FREDERICK W. SIMMS Visualização integral - 1870 |
A Treatise on the Principles and Practice of Levelling: Showing Its ... Frederick Walter Simms Visualização integral - 1870 |
Palavras e frases frequentes
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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