Elements of Surveying and Leveling: With Descriptions of the Instruments, and the Necessary Tables |
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Page 33
... Suppose that the given line were 75 feet in length , and it were required to draw it on paper , on a scale of 25 feet to the inch . 1 The length of the line , 75 feet , being divided by 25 , will give 3 , the number of inches which will ...
... Suppose that the given line were 75 feet in length , and it were required to draw it on paper , on a scale of 25 feet to the inch . 1 The length of the line , 75 feet , being divided by 25 , will give 3 , the number of inches which will ...
Page 34
... suppose half an inch ) , how many parts are to be taken ? Ans . { 5.25 parts , or 2.625 inches . 3. A line of 384 feet is drawn on paper , on a scale of 45 feet to the inch ; what is its length on the paper ? Ans . 8.53 inches . NOTE ...
... suppose half an inch ) , how many parts are to be taken ? Ans . { 5.25 parts , or 2.625 inches . 3. A line of 384 feet is drawn on paper , on a scale of 45 feet to the inch ; what is its length on the paper ? Ans . 8.53 inches . NOTE ...
Page 35
... suppose to be opposite the side B. Draw the indefinite line DF : then , A at any point of it , as D , make the Br angle FDE equal to the angle C : take E DEA , and from the point E , as a D- centre , with a radius equal to the other ...
... suppose to be opposite the side B. Draw the indefinite line DF : then , A at any point of it , as D , make the Br angle FDE equal to the angle C : take E DEA , and from the point E , as a D- centre , with a radius equal to the other ...
Page 63
... Suppose the chaining to be up hill . The fore - chainman draws the chain out to its full length , as in any other case , and then returns to within such a distance of the hind- chainman , that when the chain is drawn out to that length ...
... Suppose the chaining to be up hill . The fore - chainman draws the chain out to its full length , as in any other case , and then returns to within such a distance of the hind- chainman , that when the chain is drawn out to that length ...
Page 74
... suppose equal to b . Let CD be a vernier , equal in length , say to nine of these parts , and itself divided into ten equal spaces , each one of which is then equal to nine - tenths of b . The difference between a space on the limb and ...
... suppose equal to b . Let CD be a vernier , equal in length , say to nine of these parts , and itself divided into ten equal spaces , each one of which is then equal to nine - tenths of b . The difference between a space on the limb and ...
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Common terms and phrases
Applying logarithms axis azimuth back-sight base-line bearing chord clamp-screw column compass contour lines corresponding Cosine Cosine D Cotang course curve decimal degree of curvature degrees determined difference of level divided double meridian distance draw drawn east error example feet field-notes fore-sight given angle given line given point ground height of instrument hence horizontal angles horizontal distance horizontal plane inch intersection latitude and departure length limb line of collimation M.
M. Sine mantissa marked measured method multiplied notes offsets paper parallel passing perpendicular plane of reference plot position prismoid protractor radius reading right angles scale of equal screws secant side sights Sine D slope spider's lines stakes station subtract surface survey taken Tang tangent theodolite traverse vernier plate vertical plane wwwwwwwww yards
Popular passages
Page 56 - ... the square of the hypothenuse is equal to the sum of the squares of the other two sides.
Page 12 - The logarithm of any power of a number is equal to the logarithm of the number multiplied by the exponent of the power.
Page 17 - The minutes in the left-hand column of each page, increasing downwards, belong to the degrees at the top ; and those increasing upwards, in the right.hand column, belong to the degrees below.
Page 37 - The circumference of every circle is supposed to be divided into 360 equal parts, called degrees ; and each degree into 60 equal parts, called minutes ; and each minute into 60 equal parts, called seconds ; and these into thirds, etc.
Page 12 - The logarithm of a quotient is equal to the logarithm of the dividend minus the logarithm of the divisor.
Page 10 - When a number lies between 1 and 10, its logarithm lies between 0 and 1; that is, it is equal to 0, plus a decimal; if a number lies between 10...
Page 9 - The logarithm of a number is the exponent of the power to which it is necessary to raise a fixed number, in order to produce the first number.
Page 11 - The logarithm of the product of two numbers is equal to the sum of the logarithms of the numbers.
Page 130 - MC; hence, the double meridian distance of a course is equal to the double meridian distance of the preceding course, plus the departure of that course, plus the departure of the course itself : if .there is no preceding course, the first two terms become zero.
Page 38 - The secant of an arc is the line drawn from the centre of the circle through one extremity of the arc, and limited by the tangent passing through the other extremity. Thus, 00 is the secant of the arc AB.