A Treatise on Practical Surveying: Which is Demonstrated from Its First Principles. Wherein Everything that is Useful and Curious in that Art, is Fully Considered and ExplainedF. Lucas and Joseph Cushing, 1818 - 478 σελίδες |
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Σελίδα 76
... difference , Mult . by the remaining fig . viz . ' Cut off 3 figures , because 894 is three figures , and the product is · To which add the first log . Their sum is 12 .894 10.728 3.55230 3.55240 But because the given number consists of ...
... difference , Mult . by the remaining fig . viz . ' Cut off 3 figures , because 894 is three figures , and the product is · To which add the first log . Their sum is 12 .894 10.728 3.55230 3.55240 But because the given number consists of ...
Σελίδα 77
... difference is 35 Multiply by .07 the remaining figures .07 Product To which add the first log . Their sum is 2.45 3.09899 3.09901 Because the given number consists of 6 places , change the last index to 5 , which is one less than the ...
... difference is 35 Multiply by .07 the remaining figures .07 Product To which add the first log . Their sum is 2.45 3.09899 3.09901 Because the given number consists of 6 places , change the last index to 5 , which is one less than the ...
Σελίδα 80
... difference between the log . found , and the next following , and if your quotient do not consist of three figures ... difference of these with three cyphers is for a dividend 11000 The log . found 3.55230 The next log . 3.55242 12 ...
... difference between the log . found , and the next following , and if your quotient do not consist of three figures ... difference of these with three cyphers is for a dividend 11000 The log . found 3.55230 The next log . 3.55242 12 ...
Σελίδα 82
... II . What is the quotient of 828 by 23 ? From the log . of 828 2.91803 Take the log . of 23 1.36173 Difference 1.55630 its number Again , what is the quotient of 30550 by 47 is 36 the quotient required . 82 OF LOGARITHMS .
... II . What is the quotient of 828 by 23 ? From the log . of 828 2.91803 Take the log . of 23 1.36173 Difference 1.55630 its number Again , what is the quotient of 30550 by 47 is 36 the quotient required . 82 OF LOGARITHMS .
Σελίδα 91
... difference of any arch from 90 ° . or a quad- rant , is called the complement of that arch , and its difference from 180 ° , or a semi - circle , is called its supplement . 5. A Chord , or Subtense of an arch , is a right line joining ...
... difference of any arch from 90 ° . or a quad- rant , is called the complement of that arch , and its difference from 180 ° , or a semi - circle , is called its supplement . 5. A Chord , or Subtense of an arch , is a right line joining ...
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A Treatise of Practical Surveying: Which is Demonstrated From Its First ... Robert Gibson Δεν υπάρχει διαθέσιμη προεπισκόπηση - 2021 |
Συχνά εμφανιζόμενοι όροι και φράσεις
40 perches ABCD acres altitude Answer base bearing blank line centre chains and links chord circle circumferentor Co-secant Secant Co-sine Co-tang column compass complement contained cyphers decimal decimal fraction Dep Lat difference Dist divided divisor draw east edge EXAMPLE feet field-book figures four-pole chains half the sum height Hence hypothenuse inches instrument Lat Dep latitude length logarithm measure meridian distance multiplied needle number of degrees object off-sets parallel parallelogram perpendicular piece of ground plane pole polygon Portmarnock PROB proportion protractor quotient radius right angles right line scale of equal SCHOLIUM second station sect semicircle side sights sine square root stationary distance stationary line sun's suppose survey taken Tang thence theo theodolite THEOREM thro triangle ABC trigonometry true azimuth two-pole chains vane variation
Δημοφιλή αποσπάσματα
Σελίδα 42 - The angle in a semicircle is a right angle ; the angle in a segment greater than a semicircle is less than a right angle ; and the angle in a segment less than a semicircle is greater than a right angle.
Σελίδα 99 - ... on a side, denotes its length to be given in feet, yards, perches, or miles, &c. and this mark", either in an angle or on a side, denotes the angle or side to be required. ; From these proportions it may be observed ; that to find a side, when the angles and one side are given, any side may be made the radius; and to find an angle, one of the given sides must be made the radius. So that in the 1st, 2d, and 3d cases, any side as well required as given may be made the radius, and in the first statings...
Σελίδα 46 - Triangles upon equal bases, and between the same parallels, are equal to one another.
Σελίδα 93 - 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, &c.
Σελίδα 114 - C' (89) (90) (91) (92) (93) 112. In any plane triangle, the sum of any two sides is to their difference as the tangent of half the sum of the opposite angles is to the tangent of half their difference.
Σελίδα 4 - POMEROY, of the said District, hath deposited in this Office the title of a Book, the right whereof he claims as Proprietor, in the words following, to wit : . . "Biography of the Signers to the Declaration of Independence.
Σελίδα 48 - The hypothenuse of a right-angled triangle may be found by having the other two sides ; thus, the square root of the sum of the squares of the base and perpendicular, will be the hypothenuse. Cor. 2. Having the hypothenuse and one side given to find the other; the square root of the difference of the squares of the hypothenuse and given side will be the required side.
Σελίδα 115 - TO THEIR DIFFERENCE ; So IS THE TANGENT OF HALF THE SUM OF THE OPPOSITE ANGLES', To THE TANGENT OF HALF THEIR DIFFERENCE.
Σελίδα 175 - ... the two cardinal points of your compass the point of the needle lies between (the north, south, east, and west being called the four cardinal points, and are graved on the bottom of the box), putting down those points together by their initial letters, and thereto annexing the number of degrees, counting from the north or south, as before, thus ; if the point of your needle lies between the north and east, north and west, south and east, or south and west points in the bottom of the box, then...
Σελίδα 282 - But if one corner cannot be seen from the other, run the line according to the given bearing, and observe the nearest distance between the line so run and the corner: then...