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 10
... Sect . Page Page 40 ཌ % ¥ ཙ æ ered and demon- strated 191 • 4. Of Offsets 200 22 Promiscuous tions · 5. Method of Surveying • by Intersections 205 6. Changing the Scale of Maps . 7. Method of dividing Land ... 208 213 8. Maritime ...
... Sect . Page Page 40 ཌ % ¥ ཙ æ ered and demon- strated 191 • 4. Of Offsets 200 22 Promiscuous tions · 5. Method of Surveying • by Intersections 205 6. Changing the Scale of Maps . 7. Method of dividing Land ... 208 213 8. Maritime ...
Página 47
... Geometry , Prop . 23 , page 26 . This corollary , with the following demonstration , is found ir . Lesh's Geometry , pages 32 and 406 . ABC ; wherefore the remaining interior angle AEC , or 4 * THEOREMS . 47 Sect Page Page.
... Geometry , Prop . 23 , page 26 . This corollary , with the following demonstration , is found ir . Lesh's Geometry , pages 32 and 406 . ABC ; wherefore the remaining interior angle AEC , or 4 * THEOREMS . 47 Sect Page Page.
Página 49
... sects a given line there be drawn right lines to the extremities of the given one , they with it will form an isosceles triangle . THEOREM VII . PL . 1. fig . 25 , The angle BCD at the centre of a circle ABED is double the angle BAD at ...
... sects a given line there be drawn right lines to the extremities of the given one , they with it will form an isosceles triangle . THEOREM VII . PL . 1. fig . 25 , The angle BCD at the centre of a circle ABED is double the angle BAD at ...
Página 88
... sect . 4 . 3d . By Gunter's Scale . The first and third terms in the foregoing proportions being of a like nature , and those of the second and fourth being also like to each other ; and the proportions being direct ones ; it follows ...
... sect . 4 . 3d . By Gunter's Scale . The first and third terms in the foregoing proportions being of a like nature , and those of the second and fourth being also like to each other ; and the proportions being direct ones ; it follows ...
Página 89
... sect . 4 ) in blank lines , as before . From a scale of equal parts lay 190 from A to B , on the point B erect a perpendicular BC ( by prob . 5 , sect . 4 ) , the point where this cuts the other blank line of the angle will be Č ; so is ...
... sect . 4 ) in blank lines , as before . From a scale of equal parts lay 190 from A to B , on the point B erect a perpendicular BC ( by prob . 5 , sect . 4 ) , the point where this cuts the other blank line of the angle will be Č ; so is ...
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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.