Elements of Surveying and Leveling: With Descriptions of the Instruments, and the Necessary Tables |
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Page 30
... feet , to a scale of twenty feet to the inch . Take one inch from the scale of inches : then place one foot of the dividers at the twentieth division , and open the sector until the dividers will just reach the twentieth division on the ...
... feet , to a scale of twenty feet to the inch . Take one inch from the scale of inches : then place one foot of the dividers at the twentieth division , and open the sector until the dividers will just reach the twentieth division on the ...
Page 31
... feet in length , on the faces of which several scales are marked . The face on which the divi- sions of inches are made , contains , however , all the scales neces- sary for laying down lines and angles . These are , the scale of equal ...
... feet in length , on the faces of which several scales are marked . The face on which the divi- sions of inches are made , contains , however , all the scales neces- sary for laying down lines and angles . These are , the scale of equal ...
Page 33
... feet in length , and it were required to draw it on paper , on a scale of 25 feet to the inch . The length of the line , 75 feet , being divided by 25 , will give 3 , the number of inches which will represent the line on paper ...
... feet in length , and it were required to draw it on paper , on a scale of 25 feet to the inch . The length of the line , 75 feet , being divided by 25 , will give 3 , the number of inches which will represent the line on paper ...
Page 34
... feet is to be laid down on paper , on a scale of 40 feet to the inch ; what length must be taken from the scale ? 40 ) 640 ( 16 inches . 2. If a line of 357 feet is to be laid down on a scale of 68 feet to the unit of the scale ( which ...
... feet is to be laid down on paper , on a scale of 40 feet to the inch ; what length must be taken from the scale ? 40 ) 640 ( 16 inches . 2. If a line of 357 feet is to be laid down on a scale of 68 feet to the unit of the scale ( which ...
Page 35
... feet , equal to three - quarters of an inch , and DH equal to 120 feet , equal to six - tenths of an inch , and draw GH : then , DHG will be the required triangle . C A H 130 120 D G IX . The three sides of a triangle being given , to ...
... feet , equal to three - quarters of an inch , and DH equal to 120 feet , equal to six - tenths of an inch , and draw GH : then , DHG will be the required triangle . C A H 130 120 D G IX . The three sides of a triangle being given , to ...
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Common terms and phrases
adjusted Applying logarithms axis azimuth back-sight base-line bearing chord clamp-screw column compass corresponding Cosine Cosine D course curve decimal DegDeg degree of curvature degrees determined difference of level divided double meridian distance draw east error example feet field-notes fore-sight given angle given line ground hence horizontal angles horizontal distance horizontal plane inch intersection LatDeg LatDegDeg LatDegDegDegDeg latitude and departure length limb line of collimation locating M.
M. Sine M.
M. Sine D mantissa marked measured method multiplied NOTE offsets parallel passed perpendicular plane of reference plot position prismoid protractor radius reading right angles scale of equal screws secant side sights similar triangles Sine Cotang slope spider's lines stakes station subtract surface survey taken Tang tangent theodolite traverse vernier plate vertical plane 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.