The Theory and Practice of Surveying: Containing All the Instructions Requisite for the Skilful Practice of this Art. With a New Set of Accurate Mathematical TablesHarper, 1832 - 348 σελίδες |
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Σελίδα 9
... Protractor 2. Mensuration of Heights 137 Of Distances 146 • 3. Mensuration of Areas 151 General Method ... 177 Pennsylvania Method 187 Of computing the A- rea of a Survey , ge- ometrically consid- A 3 LIST OF TABLES . Logarithms of ...
... Protractor 2. Mensuration of Heights 137 Of Distances 146 • 3. Mensuration of Areas 151 General Method ... 177 Pennsylvania Method 187 Of computing the A- rea of a Survey , ge- ometrically consid- A 3 LIST OF TABLES . Logarithms of ...
Σελίδα 65
... protractor . A parallel rule . A pencil and screwdriver . " * Large collections are called magazine cases of instruments ; these generally contain— A pair of six inch compasses with a moveable leg , an ink point , a dotting point , the ...
... protractor . A parallel rule . A pencil and screwdriver . " * Large collections are called magazine cases of instruments ; these generally contain— A pair of six inch compasses with a moveable leg , an ink point , a dotting point , the ...
Σελίδα 66
... protractor and plain scale are always combined . The instruments in most general use are those of six inches ; instruments are seldom made longer , but often smaller . Those of six inches are , however , to be preferred , in general ...
... protractor and plain scale are always combined . The instruments in most general use are those of six inches ; instruments are seldom made longer , but often smaller . Those of six inches are , however , to be preferred , in general ...
Σελίδα 77
... protractor instead of the semi- circle , because it is in some cases more convenient , and that other scales , & c . may be placed upon it . The semicircular protractor is divided into 180 equal parts or degrees , which are numbered at ...
... protractor instead of the semi- circle , because it is in some cases more convenient , and that other scales , & c . may be placed upon it . The semicircular protractor is divided into 180 equal parts or degrees , which are numbered at ...
Σελίδα 78
... protractor to the line , so that the centre thereof may coincide exactly with the extremity ; then , with a protracting pin make a fine dot against 60 upon the limb of the protractor ; now remove the protractor , and draw a line from ...
... protractor to the line , so that the centre thereof may coincide exactly with the extremity ; then , with a protracting pin make a fine dot against 60 upon the limb of the protractor ; now remove the protractor , and draw a line from ...
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Συχνά εμφανιζόμενοι όροι και φράσεις
ABCD acres altitude arch azimuth base bearing blank line centre chains and links circle circumferentor co-sine column compasses contained cube root decimal diagonal diameter difference of latitude divided divisions divisor draw east ecliptic edge EXAMPLE feet field-book figure four-pole chains geometrical series given angle given number half the sum height Hence horizon glass hypothenuse inches instrument length logarithm manner measure meridian distance method multiplied needle nonius number of degrees object observed offsets opposite parallelogram perches perpendicular plane prob PROBLEM proportion protractor quadrant quotient radius rhombus right angles right line scale of equal SCHOLIUM screw secant sect sector semicircle side square root station stationary distance subtract suppose survey taken tangent theo theodolite THEOREM third trapezium triangle ABC trigonometry two-pole chains vane vulgar fraction whence
Δημοφιλή αποσπάσματα
Σελίδα 173 - In like manner, when it is said, that " triangles on the same base, and between the same parallels, are equal...
Σελίδα 49 - 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 163 - RULE. From half the sum of the three sides subtract each side severally.
Σελίδα 41 - 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 97 - 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 41 - The radius of a circle is a right line drawn from the centre to the circumference.
Σελίδα 52 - Triangles upon equal bases, and between the same parallels, are equal to one another.
Σελίδα 24 - The square of the sum of two numbers is equal to the square of the first number plus twice the product of the first and second number plus the square of the second number.
Σελίδα 35 - DIVISION BY LOGARITHMS. RULE. From the logarithm of the dividend subtract the logarithm of the divisor, and the number answering to the remainder will be the quotient required.