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 TablesA. S. Barnes, 1839 - 412 páginas |
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Página 41
... arch ( that is , any part of the circumference of a circle ) to the other , and is the measure of the arc . Thus the right line HG is the measure of the arc HBG , fig 8 . 18. The segment of a circle is any part thereof which is cut off ...
... arch ( that is , any part of the circumference of a circle ) to the other , and is the measure of the arc . Thus the right line HG is the measure of the arc HBG , fig 8 . 18. The segment of a circle is any part thereof which is cut off ...
Página 66
... arches and circles . If an arch or circle is to be described obscurely , the steel points are best adapted to the purpose ; if it is to be in ink or black lead , either the drawing pen , or crayon points are to be used . To use a pair ...
... arches and circles . If an arch or circle is to be described obscurely , the steel points are best adapted to the purpose ; if it is to be in ink or black lead , either the drawing pen , or crayon points are to be used . To use a pair ...
Página 67
... arches or circles , which they do much more conveniently than large com- passes , not only on account of their size , but also from the shape of the ... arch or circle is to be described of more than an inch radius 6 DRAWING INSTRUMENTS . 67.
... arches or circles , which they do much more conveniently than large com- passes , not only on account of their size , but also from the shape of the ... arch or circle is to be described of more than an inch radius 6 DRAWING INSTRUMENTS . 67.
Página 68
... arches they describe . In de- Sectors are made of different sizes , but their length is usually denominated from the length of the legs when the sector is shut . Thus a sector of six inches when the legs are close together forms a rule ...
... arches they describe . In de- Sectors are made of different sizes , but their length is usually denominated from the length of the legs when the sector is shut . Thus a sector of six inches when the legs are close together forms a rule ...
Página 71
... arch . 2. Make the same radius a trans- verse distance between 60 and 60 on the same line of chords . 3. Take out the transverse distance of the given degrees , and May this on the arch , which will mark out the angular distance ...
... arch . 2. Make the same radius a trans- verse distance between 60 and 60 on the same line of chords . 3. Take out the transverse distance of the given degrees , and May this on the arch , which will mark out the angular distance ...
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Términos y frases comunes
ABCD acres altitude arch base bearing blank line centre chains and links circle circumferentor column compasses contained Cosine Sine 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 multiplied needle nonius number of degrees object observed opposite parallelogram perches perpendicular plane prob PROBLEM proportion protractor quadrant quotient radius rhombus right angles right line scale of equal screw secant sect sector semicircle side Sine Cotang square root station stationary distance subtract suppose survey taken Tang tangent theo theodolite THEOREM trapezium triangle ABC trigonometry two-pole chains vane vulgar fraction whence
Pasajes populares
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 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 41 - The radius of a circle is a right line drawn from the centre to the circumference.
Página 45 - A lemma is something which is premised, or demonstrated, in order to render what follows more easy. A corollary is a consequent truth derived immediately from some preceding truth or demonstration.
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.
Página 21 - Then multiply the second and third terms together, and divide the product by the first term: the quotient will be the fourth term, or answer.