The Theory and Practice of Surveying: Containing All the Instructions Requisite for the Skilful Practice of this ArtJ.J. Harper, 1828 - 435 σελίδες |
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Σελίδα 4
... Theorems , and Problems , with the description and use of the Sector , Gunter's Scale , and other Mathematical drawing instruments , used by sur- veyors . The fifth section contains Plane Trigonometry , right - angled and oblique , with ...
... Theorems , and Problems , with the description and use of the Sector , Gunter's Scale , and other Mathematical drawing instruments , used by sur- veyors . The fifth section contains Plane Trigonometry , right - angled and oblique , with ...
Σελίδα 43
... theorem is a proposition , wherein something is proposed to be demonstrated . A problem is a proposition , wherein something is to be done or effected . A lemma is some ... THEOREM II . PL . 1. fig . 21 . GEOMETRICAL THEOREMS . 43.
... theorem is a proposition , wherein something is proposed to be demonstrated . A problem is a proposition , wherein something is to be done or effected . A lemma is some ... THEOREM II . PL . 1. fig . 21 . GEOMETRICAL THEOREMS . 43.
Σελίδα 44
... THEOREM II . PL . 1. fig . 21 . If one right line cross another , ( as AC does BD , ) the opposite angles made by those lines will be equal to each other : that is , AEB to CED , and BEC to AED . By theorem 1. BEC + CED = 2 right angles ...
... THEOREM II . PL . 1. fig . 21 . If one right line cross another , ( as AC does BD , ) the opposite angles made by those lines will be equal to each other : that is , AEB to CED , and BEC to AED . By theorem 1. BEC + CED = 2 right angles ...
Σελίδα 45
... THEOREM IV . PL . 1. fig . 23 . In any triangle ABC , one of its legs , as BC , being produced towards D , it will make the external angle ACD equal to the two internal opposite angles taken together ; viz . to B and A. 1 Through C ...
... THEOREM IV . PL . 1. fig . 23 . In any triangle ABC , one of its legs , as BC , being produced towards D , it will make the external angle ACD equal to the two internal opposite angles taken together ; viz . to B and A. 1 Through C ...
Σελίδα 46
... THEOREM VI . PL . 1. fig . 24 . If in any two triangles , ABC , DEF , there be two sides AB , AC in the one , severally equal to DE , DF in the other , and the angle A contained betw on the two sides in the one , ́ equal to 1 in the ...
... THEOREM VI . PL . 1. fig . 24 . If in any two triangles , ABC , DEF , there be two sides AB , AC in the one , severally equal to DE , DF in the other , and the angle A contained betw on the two sides in the one , ́ equal to 1 in the ...
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ABCD acres altitude Answer arch base bearing centre chains and links circle circumferentor Co-sec Co-tang column compasses contained cube root decimal difference of latitude Dist divided divisions divisor draw east Ecliptic edge EXAMPLE feet field-book figure four-pole chains given angle given number half the sum height Hence Horizon glass hypothenuse inches instrument length logarithm measure Meridian Altitude meridian distance method multiplied natural co-sine natural number natural sine Nonius number of degrees object observed off-sets opposite parallel parallelogram perches perpendicular plane prob PROBLEM proportional protractor Quadrant quotient radius rhombus right angles right line Secant sect semicircle Sextant side square root station subtract Sun's survey taken Tang tangent theo theodolite THEOREM trapezium triangle ABC trigonometry two-pole chains vane versed sine vulgar fraction whence