Elements of Surveying with a Description of the Instruments and the Necessary Tables Including a Table of Natural Sines |
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Page 3
... give entire uniformity to all maps and delineations of ground , and would establish a kind of language by which all the peculiarities of soil and surface could be accurately represented . An account is also given of the manner of ...
... give entire uniformity to all maps and delineations of ground , and would establish a kind of language by which all the peculiarities of soil and surface could be accurately represented . An account is also given of the manner of ...
Page 11
C. Davies. being multiplied by 87 , the figures regarded as ciphers , gives for a product 5655 ; then pointing off ... give the exact logarithm ; for , it supposes that the logarithms are propor- tional to their corresponding numbers ...
C. Davies. being multiplied by 87 , the figures regarded as ciphers , gives for a product 5655 ; then pointing off ... give the exact logarithm ; for , it supposes that the logarithms are propor- tional to their corresponding numbers ...
Page 13
... gives the required number , nearly . This rule , like that for finding the logarithm of a number when the places of figures ex- ceed four , supposes the numbers to be proportional to their corresponding logarithms . 1. Find the number ...
... gives the required number , nearly . This rule , like that for finding the logarithm of a number when the places of figures ex- ceed four , supposes the numbers to be proportional to their corresponding logarithms . 1. Find the number ...
Page 14
... gives 34.0963 for the number answering to the logarithm 1.532708 . 2. Required the number answering to the logarithm 3.233568 . The given logarithm is 3.233568 Next less tabular logarithm of 1712 is 3.233504 Their difference is Tabular ...
... gives 34.0963 for the number answering to the logarithm 1.532708 . 2. Required the number answering to the logarithm 3.233568 . The given logarithm is 3.233568 Next less tabular logarithm of 1712 is 3.233504 Their difference is Tabular ...
Page 16
... gives 2 for a result , as set down . ARITHMETICAL COMPLEMENT . 16. The Arithmetical complement of a logarithm is the num- ber which remains after subtracting this logarithm from 10 . 10-9.274687 0.725313 . Thus Hence , of 9.274687 ...
... gives 2 for a result , as set down . ARITHMETICAL COMPLEMENT . 16. The Arithmetical complement of a logarithm is the num- ber which remains after subtracting this logarithm from 10 . 10-9.274687 0.725313 . Thus Hence , of 9.274687 ...
Common terms and phrases
acres adjusted angle of elevation axis azimuth back-sights base line called centre clamp-screw coincide column comp compass Cosine D Cosine Sine Cotang course curve decimal degrees determined difference of level direction divided double meridian distance draw east elongation error example feet field notes figure given angle given line given point ground Gunter's chain half hence horizontal angle horizontal distance horizontal plane hypothenuse inches instrument intersection latitude and departure length levelling screws line AC line of collimation logarithm M.
M. Sine marked measure method multiplied natural sines needle object paper parallel passing perpendicular piece of land pins plane of reference protractor radius right angles right-angled triangle rods scale of equal secant side similar triangles spider's lines square chains staff subtract surface survey Tang tangent theodolite true meridian vernier plate vertical limb yards