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 páginas |
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Página 5
... grounds when the waters were with- drawn . And this opinion is not entirely to be rejected , when we consider that Moses is said to have acquired this art when he resided at the Egyptian court . Achilles Tatius , in the beginning of his ...
... grounds when the waters were with- drawn . And this opinion is not entirely to be rejected , when we consider that Moses is said to have acquired this art when he resided at the Egyptian court . Achilles Tatius , in the beginning of his ...
Página 7
... ground , with promiscuous questions . Section the first ( Part the Third ) contains the astro- nomical methods of finding the latitude , variation of the compass , & c . , with a description of the instruments used . in these operations ...
... ground , with promiscuous questions . Section the first ( Part the Third ) contains the astro- nomical methods of finding the latitude , variation of the compass , & c . , with a description of the instruments used . in these operations ...
Página 109
... ground , are measured either by Gunter's chain of four poles or perches , which con- sists of 100 links ( and this is the most natural division ) , or by one of 50 links , which contains two poles or perches : but be- cause the length ...
... ground , are measured either by Gunter's chain of four poles or perches , which con- sists of 100 links ( and this is the most natural division ) , or by one of 50 links , which contains two poles or perches : but be- cause the length ...
Página 110
... ground ; and leaving it there , he draws on the chain till the hinder man checks him when he arrives at that peg : the chain being again stretched , the fore man sticks down another peg , and the hind man takes up the former ; and thus ...
... ground ; and leaving it there , he draws on the chain till the hinder man checks him when he arrives at that peg : the chain being again stretched , the fore man sticks down another peg , and the hind man takes up the former ; and thus ...
Página 113
... ground for houses is measured by feet , we will show how to reduce one to the other in the following problems . PROBLEM I. To reduce two - pole chains and links to four - pole ones . If the number of chains be even , the half of them ...
... ground for houses is measured by feet , we will show how to reduce one to the other in the following problems . PROBLEM I. To reduce two - pole chains and links to four - pole ones . If the number of chains be even , the half of them ...
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Términos y frases comunes
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
Pasajes populares
Página 173 - In like manner, when it is said, that " triangles on the same base, and between the same parallels, are equal...
Página 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.
Página 163 - RULE. From half the sum of the three sides subtract each side severally.
Página 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.
Página 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.
Página 41 - The radius of a circle is a right line drawn from the centre to the circumference.
Página 52 - Triangles upon equal bases, and between the same parallels, are equal to one another.
Página 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.
Página 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.