Elements of Surveying, and Navigation: With Descriptions of the Instruments and the Necessary TablesA. S. Barnes & Company, 1854 - 322 páginas |
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Página 10
... decimal part . The entire part is called the characteristic of the logarithm , and is always one less than the number of places of figures in the given number . 3. The principal use of logarithms , is to abridge nu merical computations ...
... decimal part . The entire part is called the characteristic of the logarithm , and is always one less than the number of places of figures in the given number . 3. The principal use of logarithms , is to abridge nu merical computations ...
Página 11
... decimal part , we may change the place of the decimal point without changing the deci mal part of the logarithm ; but the characteristic is dimin ished by 1 for every place that the decimal point is removed to the left . In the ...
... decimal part , we may change the place of the decimal point without changing the deci mal part of the logarithm ; but the characteristic is dimin ished by 1 for every place that the decimal point is removed to the left . In the ...
Página 12
... decimal part thus found , the characteristic , you will have the logarithm sought : Thus , log 89793.953228 log .089792.953228 If , however , in passing back from the four figures found to the 0 column , any dots be met with , the two ...
... decimal part thus found , the characteristic , you will have the logarithm sought : Thus , log 89793.953228 log .089792.953228 If , however , in passing back from the four figures found to the 0 column , any dots be met with , the two ...
Página 13
... decimal part of the logarithm : place a decimal point after the fourth figure from the left hand , converting the given number into a whole number and decimal . Find the logarithm of the entire part by the rule just given , then take ...
... decimal part of the logarithm : place a decimal point after the fourth figure from the left hand , converting the given number into a whole number and decimal . Find the logarithm of the entire part by the rule just given , then take ...
Página 14
... decimal part of the given logarithm : if it cannot be found in the table , take out the number corresponding to the next less logarithm and set it aside . Subtract this less logarithm from the given logarithm , and annex to the ...
... decimal part of the given logarithm : if it cannot be found in the table , take out the number corresponding to the next less logarithm and set it aside . Subtract this less logarithm from the given logarithm , and annex to the ...
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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.