Aid to Survey Practice for Reference in Surveying, Levelling, and Setting OutC. Lockwood and Company, 1880 - 382 pages |
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Page 11
... effect the reduction to miles are inconvenient for distances less than a mile , and do not yield very accurate results in any case . Guessing or judging distance may , with continued practice and checking , be carried to an accuracy ...
... effect the reduction to miles are inconvenient for distances less than a mile , and do not yield very accurate results in any case . Guessing or judging distance may , with continued practice and checking , be carried to an accuracy ...
Page 22
... effect this adjustment , first sight a 10 - feet staff , and next a shorter one , say of 5 feet , at the same dis- tance , and try with the acquired data whether the base line of the instrument remains in each case proportional to the ...
... effect this adjustment , first sight a 10 - feet staff , and next a shorter one , say of 5 feet , at the same dis- tance , and try with the acquired data whether the base line of the instrument remains in each case proportional to the ...
Page 26
... of all reflecting instruments ( see Section on Angular Measurement ) , and if it should be required to effect an index adjustment , the screws under the end- 26 CHAP . I. INSTRUMENTS AND CALCULATIONS Adie's 36-inch instrument.
... of all reflecting instruments ( see Section on Angular Measurement ) , and if it should be required to effect an index adjustment , the screws under the end- 26 CHAP . I. INSTRUMENTS AND CALCULATIONS Adie's 36-inch instrument.
Page 27
... effect of varied refraction is annihilated in results . The defects of telemeters based on this principle are ― That the twice reflected images in long sights lose their sharpness of outline , and that the two images being in very close ...
... effect of varied refraction is annihilated in results . The defects of telemeters based on this principle are ― That the twice reflected images in long sights lose their sharpness of outline , and that the two images being in very close ...
Page 31
... effect of these errors all round the circle , or throughout the length of the vernier , and nearly neutralises them . It is thus . Having observed an angle in the usual way from zero , and noted the position of the index , clamp the two ...
... effect of these errors all round the circle , or throughout the length of the vernier , and nearly neutralises them . It is thus . Having observed an angle in the usual way from zero , and noted the position of the index , clamp the two ...
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Aid to Survey Practice for Reference in Surveying, Levelling, and Setting Out Lowis D'Aguilar Jackson No preview available - 2016 |
Common terms and phrases
Absc Abscissa accuracy adjustment adopted altitude amount angular measurement angular observation appliances astronomical observations axis azimuth base line bearings calculation centre chain surveys chord chronometer collimation compass convenient correct corresponding cosec cotg curvature curve determined difference direction distant point equal error feet figure fixed formulæ given graduated Greenwich mean ground Gunter's chains height hence horizontal angle inch instru instrument latitude length level-staff longitude lunar distance marked mean ment meridian method micrometer mile mode Nautical Almanac necessary object obtained operations Ordinate parallax pegs plane pole position principle purposes radii radius reading recorded reduced reflecting refraction right angles right ascensions route-surveys scale screws Section set-out setting-out sextant side sights sin² spherical spherical excess staff station staves subtended superelevation survey line surveyor tangent tangent point telemeter telescope theodolite tion transit traverse triangles Trigonometrical Trigonometrical Survey vertical wires
Popular passages
Page 21 - Those interested in the purchase and sale of estates, and in the adjustment of compensation cases, as well as in transactions in annuities, life insurances, &c., will find the present edition of eminent service.'* — Engineering.
Page 12 - A KEY AND COMPANION to the above Book, forming an extensive repository of Solved Examples and Problems in Illustration of the various Expedients necessary in Algebraical Operations.
Page 6 - Levelling. A TREATISE ON THE PRINCIPLES AND PRACTICE OF LEVELLING. Showing its Application to purposes of Railway and Civil Engineering, in the Construction of Roads; with Mr. TELFORD'S Rules for the same. By FREDERICK W. SIMMS, FGS, M. Inst. CE...
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Page 9 - AN OUTLINE OF THE METHOD OF CONDUCTING A TRIGONOMETRICAL SURVEY. For the Formation of Geographical and Topographical Maps and Plans, Military Reconnaissance, LEVELLING, &c., with Useful Problems, Formulae, and Tables.
Page 16 - FRENCH. ~~ 24. French Grammar. With Complete and Concise Rules on the Genders of French Nouns. By GL STRAUSS, Ph.D. is 6d 25.
Page 16 - Spanish-English and English-Spanish Dictionary. Including a large number of Technical Terms used in Mining, Engineering, &c., with the proper Accents and the Gender of every Noun. By ALFRED ELWES.
Page 11 - Diagrams. i8mo, 2s. 6d. cloth. " As a really handy book for reference, we know of no work equal to it ; and the railway engineers and others employed in the measurement and calculation of earthwork will find a great amount of practical information very admirably arranged, and available for general or rough estimates, as well as for the more exact calculations required in the engineers
Page 7 - Professor Goodeve has given us a treatise on the steam engine, which will bear comparison with anything written by Huxley or Maxwell, and we can award it no higher praise.
Page 26 - Whether we consider the liberality and beauty of the illustrations, the charm of the writing, or the durable interest of the matter, we must express our belief that there is hardly to be found •among the new books one that would be welcomed by people of so many ages and classes as a valuable present."— Examiner.