Elements of Surveying: With a Description of the Instruments and the Necessary Tables, Including a Table of Natural Sines |
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Page 9
... figures of the given number . Then , pass across the page , along a horizontal line , into the columns marked 0 , 1 , 2 , 3 , 4 , 5 , & c . , until you come to the column which is designated by the fourth figure of the given number : at ...
... figures of the given number . Then , pass across the page , along a horizontal line , into the columns marked 0 , 1 , 2 , 3 , 4 , 5 , & c . , until you come to the column which is designated by the fourth figure of the given number : at ...
Page 10
... figures found are opposite a line of only four figures , you are then to ascend the column till you come to the line of six figures ; the two figures , at the left hand , are to be prefixed , and then the decimal part of the logarithm ...
... figures found are opposite a line of only four figures , you are then to ascend the column till you come to the line of six figures ; the two figures , at the left hand , are to be prefixed , and then the decimal part of the logarithm ...
Page 11
... figure on the left of the decimal point . 10. This method of finding the logarithms of numbers which exceed four places of figures , does not give the exact logarithm ; for , it supposes that the logarithms are propor- tional to their ...
... figure on the left of the decimal point . 10. This method of finding the logarithms of numbers which exceed four places of figures , does not give the exact logarithm ; for , it supposes that the logarithms are propor- tional to their ...
Page 12
... figure . Therefore , the logarithm of a decimal fraction is found , by considering it as a whole number , and then prefixing to the deci- mal part of its logarithm a negative characteristic greater by unity than the number of ciphers ...
... figure . Therefore , the logarithm of a decimal fraction is found , by considering it as a whole number , and then prefixing to the deci- mal part of its logarithm a negative characteristic greater by unity than the number of ciphers ...
Page 13
... figures to the right as decimals . If the characteristic of the given logarithm is 0 , there will be one place ... figure ; if it is 3 , there will be two , & c The number whose logarithm is 1.492481 , is found at page 5 , and is ...
... figures to the right as decimals . If the characteristic of the given logarithm is 0 , there will be one place ... figure ; if it is 3 , there will be two , & c The number whose logarithm is 1.492481 , is found at page 5 , and is ...
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Common terms and phrases
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 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 hence horizontal angle horizontal distance horizontal plane hypothenuse inches instrument intersection LatDegDegDegDeg Distance 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 plane of reference protractor radius right angles right-angled triangle rods scale of equal secant side sights similar triangles Sine Sine spider's lines square chains staff subtract surface survey Tang tangent theodolite true meridian vernier plate vertical limb yards