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 113
... perch ; and because 320 perches make a mile , therefore 640 rotations will be a mile also ; and the machinery is so con- trived that by means of a hand , which is carried round by the work , it points out the miles , quarters , and perches ...
... perch ; and because 320 perches make a mile , therefore 640 rotations will be a mile also ; and the machinery is so con- trived that by means of a hand , which is carried round by the work , it points out the miles , quarters , and perches ...
Σελίδα 114
... perches are a chain ) , the product will be the perches and decimal parts of a perch . Thus : ch . l . How many perches in 13. 64 of four - pole chains ? 4 Answer , 54. 56 perches . PROBLEM IV . To reduce two - pole chains and links to ...
... perches are a chain ) , the product will be the perches and decimal parts of a perch . Thus : ch . l . How many perches in 13. 64 of four - pole chains ? 4 Answer , 54. 56 perches . PROBLEM IV . To reduce two - pole chains and links to ...
Σελίδα 115
... perches ? 2. 4 Answer , 34. 84 perches . ch . l . 2. In 15. 38 of two - pole chains how many perches ? 2. 4 Answer , 31. 52 perches . PROBLEM V. To reduce perches and decimals of a perch to four - pole chains and links . Divide by 4 ...
... perches ? 2. 4 Answer , 34. 84 perches . ch . l . 2. In 15. 38 of two - pole chains how many perches ? 2. 4 Answer , 31. 52 perches . PROBLEM V. To reduce perches and decimals of a perch to four - pole chains and links . Divide by 4 ...
Σελίδα 133
... perches to an inch , every division on the protractor's edge will be one two - pole chain ; of a di- vision will be 25 links , and of a division will be 12 links . If your map is to be laid down by a scale of 20 perches to an inch , two ...
... perches to an inch , every division on the protractor's edge will be one two - pole chain ; of a di- vision will be 25 links , and of a division will be 12 links . If your map is to be laid down by a scale of 20 perches to an inch , two ...
Σελίδα 134
... perches to an inch ? 25 8 210 ) 2010 10 links , Answer . 2. How many links in a division , if a map be laid down by a scale of 10 perches to an inch ? 25 10 And so of any other . 210 ) 2510 12.5 or 12 links , Answer . To protract a ...
... perches to an inch ? 25 8 210 ) 2010 10 links , Answer . 2. How many links in a division , if a map be laid down by a scale of 10 perches to an inch ? 25 10 And so of any other . 210 ) 2510 12.5 or 12 links , Answer . To protract a ...
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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.