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 109
... two poles or perches : but be- cause the length of a perch differs in many places , therefore the length of chains and their respectivé links will differ also . The English statute - perch is 5 yards , the two - pole ... pole one is 22 yards ...
... two poles or perches : but be- cause the length of a perch differs in many places , therefore the length of chains and their respectivé links will differ also . The English statute - perch is 5 yards , the two - pole ... pole one is 22 yards ...
Σελίδα 110
... two large rings . In such chains as have a brass piece at every 10 links ... pole chain has a large ring at every 10 links , and in its middle , or at 25 links , there are two large rings ; so that any ... chains 110 OF THE CHAIN . The Chain.
... two large rings . In such chains as have a brass piece at every 10 links ... pole chain has a large ring at every 10 links , and in its middle , or at 25 links , there are two large rings ; so that any ... chains 110 OF THE CHAIN . The Chain.
Σελίδα 112
... chains , or links , will give the base , as before . If the inclined side of ... two - pole chain ( when extended above the surface of the earth by a force ... chains c , then c.2b - 2 ( b - a ” ) = the whole excess on the horizontal line ...
... chains , or links , will give the base , as before . If the inclined side of ... two - pole chain ( when extended above the surface of the earth by a force ... chains c , then c.2b - 2 ( b - a ” ) = the whole excess on the horizontal line ...
Σελίδα 113
... chain more accurately ; for 80 four - pole , or 160 two - pole chains , or 320 perches , make a mile as before and if roads are measured by a statute chain , it will give you the miles English , but if by a plantation chain , the miles ...
... chain more accurately ; for 80 four - pole , or 160 two - pole chains , or 320 perches , make a mile as before and if roads are measured by a statute chain , it will give you the miles English , but if by a plantation chain , the miles ...
Σελίδα 114
... pole chains and links . Thus : 2. In 17ch . 421. of two - pole chains how many four - pole Answer 8ch . 921 . ones ? PROBLEM II . To reduce four - pole chains and links to two - pole ones . Double the chains , to which annex the links ...
... pole chains and links . Thus : 2. In 17ch . 421. of two - pole chains how many four - pole Answer 8ch . 921 . ones ? PROBLEM II . To reduce four - pole chains and links to two - pole ones . Double the chains , to which annex the links ...
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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.