Elements of Surveying, and Navigation: With Descriptions of the Instruments and the Necessary TablesA. S. Barnes & Company, 1854 - 322 páginas |
Dentro del libro
Resultados 1-5 de 33
Página 34
... 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 . 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 . The length of the line 75 feet , being divided by 25 , will give 3 , the number of inches which will ...
Página 35
... 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 . REMARK ...
... 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 . REMARK ...
Página 36
... suppose is opposite the side B. Draw the indefinite line DF and make the angle FDH equal to the angle C : take DH = A , from the point H , as a centre , with a radius equal to the other given side , B , describe an arc cutting AH BH ...
... suppose is opposite the side B. Draw the indefinite line DF and make the angle FDH equal to the angle C : take DH = A , from the point H , as a centre , with a radius equal to the other given side , B , describe an arc cutting AH BH ...
Página 40
... suppose , that in a circle of a given radius , the lengths of the sine , cosine , tangent , and cotangent , have been calculated for every minute or second of the quad- rant , and arranged in a table ; such a table is called a table of ...
... suppose , that in a circle of a given radius , the lengths of the sine , cosine , tangent , and cotangent , have been calculated for every minute or second of the quad- rant , and arranged in a table ; such a table is called a table of ...
Página 55
... suppose that we have found AB = 600 yards , CAB 57 ° 35 ' , and CBA = 64 ° 51 ' . The angle C180 ° - ( A + B ) = 57 ° 34 ' . To find the distance BC . sin C 57 ° 34 ' ar . comp . 0.073649 : sin A 57 ° 35 ' 9.926431 :: AB 600 2.778151 BC ...
... suppose that we have found AB = 600 yards , CAB 57 ° 35 ' , and CBA = 64 ° 51 ' . The angle C180 ° - ( A + B ) = 57 ° 34 ' . To find the distance BC . sin C 57 ° 34 ' ar . comp . 0.073649 : sin A 57 ° 35 ' 9.926431 :: AB 600 2.778151 BC ...
Otras ediciones - Ver todas
Términos y frases comunes
axis back-sight base line bearing called centre column comp Cosine Cosine D course decimal degrees determined diff difference of latitude difference of level direction divided double meridian distance draw east error example feet figure fore-sight given angle given line given point half hence horizontal distance horizontal line hypothenuse inch instrument intersection LatDegDegDegDeg length limb line of collimation logarithm longitude M.
M. Sine marked measure method middle latitude miles multiplied paper parallel PARALLEL SAILING perpendicular plane of reference plane sailing plane triangle protractor quotient radius right angles right-angled triangle rods sailing scale of chords scale of equal screws secant sector sides sights Sine Cotang Sine D spherical excess spider's lines square chains staff station straight line subtract surface survey Tang tangent telescope theodolite trigonometrical vernier plate vertical yards
Pasajes populares
Página 14 - The logarithm of the quotient of two numbers is equal to the logarithm of the dividend minus the logarithm of the divisor.
Página 42 - The circumference of every circle is supposed to be divided into 360 equal parts, called degrees...
Página 13 - 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.
Página 25 - ... 20. An EQUILATERAL polygon is one which has all its sides equal; an equiangular polygon, is one which has all its angles equal. 21. Two polygons are mutually equilateral, when they have their sides equal each to each, and placed in the same order : that is to say, when following their bounding lines in the same direction, the first side of the one is equal to the first side of the other, the second to the second, the third to the third, and so on. 22. Two polygons are mutually equiangular, when...
Página 20 - The difference of the logarithms, as here used, means the algebraic difference ; so that, if the logarithm of the divisor have a negative characteristic, its sign must be changed to positive, after diminishing it by the unit, if any, carried in the subtraction from the decimal part of the logarithm.
Página 135 - Soon after the organization of the present government, several of the states ceded to the United States large tracts of wild land, and these together with the lands since acquired by treaty and purchase, constitute what is called the public lands or public domain. Previous to the year 1802 these lands were parcelled out without reference to any general plan, in consequence of which the titles often conflicted with each other, and in many cases, several grants .covered the same premises. In the year...
Página 96 - Then, find the areas of the triangles separately, and their sum will be the area of the quadrilateral.
Página 43 - The tangent of an arc is the line which touches it at one extremity, and is limited by a line drawn through the other extremity and the centre of the circle. Thus, AC is the tangent of the arc AB.
Página 28 - B + 0, the product would be indicated thus; (A+D)x(A-B+C), whatever is enclosed within the curved lines, being considered as a single quantity. The same thing may also be indicated by a bar : thus, A+B+OXD, denotes that the sum of A, B and C, is to be multiplied by D.
Página 1 - 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.