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 10
... sights at right angles to each other , or more commonly with two fine grooves sawed at right angles to each other , which answer the purpose of sights . It is sometimes fixed on a staff , of convenient length for use , pointed with iron ...
... sights at right angles to each other , or more commonly with two fine grooves sawed at right angles to each other , which answer the purpose of sights . It is sometimes fixed on a staff , of convenient length for use , pointed with iron ...
Page 33
... SIGHT . Let A B be a chain - line , the direct measurement of which is prevented by the unforeseen obstruction of the pond P. Measure An till it reach to , or near to , the edge of the pond , as to î , and fasten the ends of the chain ...
... SIGHT . Let A B be a chain - line , the direct measurement of which is prevented by the unforeseen obstruction of the pond P. Measure An till it reach to , or near to , the edge of the pond , as to î , and fasten the ends of the chain ...
Page 34
... SIGHT , AS A BUILDING . Let A B be a chain - line , the measurement of which is pre- vented by the building B. At m , four or five chains from the building , take a perpendicular mn , of such a length that the line B ns may clear the ...
... SIGHT , AS A BUILDING . Let A B be a chain - line , the measurement of which is pre- vented by the building B. At m , four or five chains from the building , take a perpendicular mn , of such a length that the line B ns may clear the ...
Page 70
... sight vane , having a fine thread stretched along its opening , which is to cut the point to be observed by the instrument . The sight vane is mounted upon a hinge joint , so that it can be turned down flat in the box , when not in use ...
... sight vane , having a fine thread stretched along its opening , which is to cut the point to be observed by the instrument . The sight vane is mounted upon a hinge joint , so that it can be turned down flat in the box , when not in use ...
Page 71
... sight - vane . For the purpose of taking the bearings of objects much above or below the level of the observer , a mirror R is supplied with the instrument , which slides on and off the sight - vane S , with sufficient friction to ...
... sight - vane . For the purpose of taking the bearings of objects much above or below the level of the observer , a mirror R is supplied with the instrument , which slides on and off the sight - vane S , with sufficient friction to ...
Contents
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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.