Aid to Survey Practice for Reference in Surveying, Levelling, and Setting OutC. Lockwood and Company, 1880 - 382 pages |
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Page 13
... nearly , as & is small . Thirdly , when the graduated staff is not truly ver- tical , Let s be the intercepted height when truly vertical , s ' be the intercepted height when inclined at an angle 0 , then s's cos 0 , and the previous ...
... nearly , as & is small . Thirdly , when the graduated staff is not truly ver- tical , Let s be the intercepted height when truly vertical , s ' be the intercepted height when inclined at an angle 0 , then s's cos 0 , and the previous ...
Page 31
... nearly eliminated by Borda's method of repetition , which distributes the 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 ...
... nearly eliminated by Borda's method of repetition , which distributes the 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 ...
Page 35
... nearly so , by using the adjusting screws made for this purpose ; in larger instruments of this kind a striding level may be used for checking this error , and the deduced level correction applied to all angles taken , on the principle ...
... nearly so , by using the adjusting screws made for this purpose ; in larger instruments of this kind a striding level may be used for checking this error , and the deduced level correction applied to all angles taken , on the principle ...
Page 52
... nearly equal . 4. The reduction of a slightly - oblique to a horizontal angle . If h and be the altitudes of the two objects in seconds , and D = the observed slightly - oblique angle , then approximately the correction x = ( h + h ...
... nearly equal . 4. The reduction of a slightly - oblique to a horizontal angle . If h and be the altitudes of the two objects in seconds , and D = the observed slightly - oblique angle , then approximately the correction x = ( h + h ...
Page 53
... nearly meridional , by the difference of the two observed latitudes of its extremities . Let L - L ' be the difference of latitudes in seconds , 99 M be the true azimuth of the base line , d be the reduced length of the base line in ...
... nearly meridional , by the difference of the two observed latitudes of its extremities . Let L - L ' be the difference of latitudes in seconds , 99 M be the true azimuth of the base line , d be the reduced length of the base line in ...
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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...
Page 15 - Edition, is. 49. Derivative Spelling-Book : Giving the Origin of Every Word from the Greek, Latin, Saxon, German, Teutonic, Dutch, French, Spanish, and other Languages ; with their present Acceptation and Pronunciation. By J. ROWBOTHAM, FRAS Improved Edition. is. 6d.
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.