A Rudimentary Treatise on Land and Engineering Surveying, with all the modern improvements ... With illustrationsVirtue brothers & Company, 1865 - 232 pages |
From inside the book
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Page 8
... vertically opposite are equai : - thus the angle AGE = angle H G B , and EG BAG H. ( Euc . I. 15. ) THEOREM II . ( See last figure . ) A right line EF , cutting two parallel right lines AB , CD , makes the alternate angle equal , & c ...
... vertically opposite are equai : - thus the angle AGE = angle H G B , and EG BAG H. ( Euc . I. 15. ) THEOREM II . ( See last figure . ) A right line EF , cutting two parallel right lines AB , CD , makes the alternate angle equal , & c ...
Page 34
... vertical , at n and q , measure qsu in the direction nq of the poles , taking offsets to the building till it be cleared at s . Now on the line qu , at the dis- tance su , at or about equal to mp , erect the perpendiculars sr , ut ...
... vertical , at n and q , measure qsu in the direction nq of the poles , taking offsets to the building till it be cleared at s . Now on the line qu , at the dis- tance su , at or about equal to mp , erect the perpendiculars sr , ut ...
Page 52
... vertical under the end so held up : but when a large and accurate survey is required , the distances must be measured along the line of ground , and the angles of elevation and of depression of the several inclined parts of the line ...
... vertical under the end so held up : but when a large and accurate survey is required , the distances must be measured along the line of ground , and the angles of elevation and of depression of the several inclined parts of the line ...
Page 73
... vertical plane . - Hold the instrument in the right hand , and bring down the reflected image of the upper object by turning the milled head B , till it exactly coincides with the direct image of the lower object , and the reading of ...
... vertical plane . - Hold the instrument in the right hand , and bring down the reflected image of the upper object by turning the milled head B , till it exactly coincides with the direct image of the lower object , and the reading of ...
Page 74
... vertical limb for measuring vertical angles , the horizontal limb for measuring horizontal angles , and the parallel plates , in the lower of which is a female screw , adapted to the staff - head , which is connected by brass joints ...
... vertical limb for measuring vertical angles , the horizontal limb for measuring horizontal angles , and the parallel plates , in the lower of which is a female screw , adapted to the staff - head , which is connected by brass joints ...
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Common terms and phrases
ABCD accuracy acres adjustment arches axis beam compasses breadth bubble centre chains common correct cross sections cubic yards cutting datum line depth direction distance divided draw embankments equal error EXAMPLE feet field book figure finding the contents fore sights formation level formula Gentleman's Diary given gradient ground height horizontal inches instrument intersection laid Lay the ruler length level book main line mark measured mile move it parallel NOTE object offsets parallax parallel ruler perpendicular position Prob protractor quality lines quantity of land radii radius railway curves Rankine's method ratio right angles river river Ouse road scale screw serpentine curve shewn shews side sine slopes spirit level square links staff stations straight fence surface survey surveyors taken taking tangent telescope theodolite tion Tithe Commissioners trapezium triangle tube tunnel vernier vernier scale vertical viaduct whence
Popular passages
Page 3 - 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.
Page 123 - An Act for consolidating in one Act certain provisions usually inserted in Acts of inclosure, and for facilitating the mode of proving the several facts usually required on the passing of such Acts...
Page 240 - Gd. 108*. METROPOLIS LOCAL MANAGEMENT AMENDMENT ACT, 1862 ; with Notes and Index. Is. 109. NUISANCES REMOVAL AND DISEASE PREVENTION ACT. Is. 110. RECENT LEGISLATIVE ACTS applying to Contractors, Merchants, and Tradesmen. Is.
Page 8 - Similar triangles are to one another in the duplicate ratio of their homologous sides.