A Treatise on Surveying, Containing the Theory and Practice: To which is Prefixed a Perspicuous System of Plane Trigonometry. The Whole Clearly Demonstrated and Illustrated by a Large Number of Appropriate Examples. Particularly Adapted to the Use of SchoolsJ. Richardson, 1817 - 206 σελίδες |
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Σελίδα 12
... according as the multiplier consists of one or two figures ; then add the remaining figure or figures of the product to the logarithm first taken out of the table , and the sum will be the logarithm required . Thus , let it be required ...
... according as the multiplier consists of one or two figures ; then add the remaining figure or figures of the product to the logarithm first taken out of the table , and the sum will be the logarithm required . Thus , let it be required ...
Σελίδα 14
... out the four figures answering to it as before . Subtract this logarithm from the next greater in the ta- 15 ference annex one or two ciphers , according as bie , and also from the given logarithm ; to the latter diff 14 LOGARITHMS .
... out the four figures answering to it as before . Subtract this logarithm from the next greater in the ta- 15 ference annex one or two ciphers , according as bie , and also from the given logarithm ; to the latter diff 14 LOGARITHMS .
Σελίδα 15
... according as five or six figures are required , and divide the number thus pro- duced , by the former difference ; annex the quotient to the right hand of the four figures already found , and it will give the natural number required ...
... according as five or six figures are required , and divide the number thus pro- duced , by the former difference ; annex the quotient to the right hand of the four figures already found , and it will give the natural number required ...
Σελίδα 41
... .. The primary divisions on the second part of the scale , are estimated according to the value set upon the unit on the left hand of the scale : If the first 1 be considered F as a unit , then the first 1 , 2 PLANE TRIGONOMETRY . 41.
... .. The primary divisions on the second part of the scale , are estimated according to the value set upon the unit on the left hand of the scale : If the first 1 be considered F as a unit , then the first 1 , 2 PLANE TRIGONOMETRY . 41.
Σελίδα 42
... according to the value set upon the primary divisions . Sines . - The line of sines , marked Sin . is numbered from the left hand of the scale towards the right , 1 , 2 , 3 , 4 , & c . to 10 , then 20 , 30 , 40 , & c . to 90 , where it ...
... according to the value set upon the primary divisions . Sines . - The line of sines , marked Sin . is numbered from the left hand of the scale towards the right , 1 , 2 , 3 , 4 , & c . to 10 , then 20 , 30 , 40 , & c . to 90 , where it ...
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Συχνά εμφανιζόμενοι όροι και φράσεις
ABCD ABFD acres adjacent adjacent angles angle ABC angle opposite angled triangle base bearing and distance breadth Calculation centre Co-secant Secant Co-sine Co-tang column contained decimal degrees DEMONSTRATION departure corresponding diff difference of latitude Dist divide division line draw equal EXAMPLES feet field-notes figures find the angle find the area four-pole chains fourth term given angle given area given bearing given number given ratio given side John Gummere Lat Dep latitude and departure length logarithm measured meridian distance natural number off-sets parallel parallelogram perches perpendicular quired quotient radius rectangle remainder Required the area right angles right line right-angled triangle ROBERT ADRAIN RULE semicircle semiperimeter side AB side AC sine square root station stationary line subtract tance Tang Tangent tract of land trapezium trapezoid triangle ABC trigonometry
Δημοφιλή αποσπάσματα
Σελίδα 2 - District, has deposited in this office the title of a book, the right whereof he claims as proprietor, in the words following, to wit : " THE CHILD'S BOTANY," In conformity to the act of the Congress of the United States, entitled, " An act for the encouragement of learning by securing the copies of maps, charts, and books to the authors and proprietors of such copies, during the times therein mentioned...
Σελίδα 35 - The circumference of every circle is supposed to be divided into 360 equal parts, called degrees ; each degree into 60 equal parts, called minutes ; and each minute into 60 equal parts, called seconds.
Σελίδα 44 - The angle at the centre of a circle is double of the angle at the circumference upon the same base, that is, upon the same part of the circumference.
Σελίδα 53 - TO THEIR DIFFERENCE ; So IS THE TANGENT OF HALF THE SUM OF THE OPPOSITE ANGLES', To THE TANGENT OF HALF THEIR DIFFERENCE.
Σελίδα 26 - A plane rectilineal angle is the inclination of two straight lines to one another, which meet together, but are not in the same straight line.
Σελίδα 79 - A maypole, whose top was broken off by a blast of wind, struck the ground at 15 feet distance from the foot of the pole: what was the height of the whole maypole, supposing the broken piece to measure 39 feet in length ? Ans.
Σελίδα 29 - A diameter of a circle is a straight line drawn through the centre, and terminated both ways by the circumference.
Σελίδα 36 - Sine, or Right Sine, of an arc, is the line drawn from one extremity of the arc, perpendicular to the diameter which passes through the other extremity. Thus, BF is the sine of the arc AB, or of the supplemental arc BDE.
Σελίδα 92 - To find the Area of a Triangle when the Three Sides are given. Rule. — From half the sum of the three sides subtract each side separately.
Σελίδα 26 - A plane superficies is that in which any two points being taken, the straight line between them lies wholly in that superficies. 8. A plane angle is the inclination of two lines to one another in a plane, which meet together, but are not in the same direction.