A Rudimentary Treatise on Land and Engineering Surveying, with all the modern improvements ... With illustrationsVirtue brothers & Company, 1865 - 232 pages |
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Page 7
... taking the A- B extent of 41 ° from the same line of chords , set it off from B to C ; join A C ; then B A C is the angle required . PROBLEM XV . To measure an angle contained by two straight lines . ( See last figure . ) Let AB , AC ...
... taking the A- B extent of 41 ° from the same line of chords , set it off from B to C ; join A C ; then B A C is the angle required . PROBLEM XV . To measure an angle contained by two straight lines . ( See last figure . ) Let AB , AC ...
Page 9
... taking out some of the rings between the links : for this purpose , chains having three rings between each link are to be preferred to those having only two . THE OFFSET STAFF . The offset staff is used to measure short distances ...
... taking out some of the rings between the links : for this purpose , chains having three rings between each link are to be preferred to those having only two . THE OFFSET STAFF . The offset staff is used to measure short distances ...
Page 12
... taking large distances , proportional compasses , & c . , the uses of which are easily learned . ( See Heather's Treatise on Mathematical Instruments . ) PLOTTING SCALES . Plotting scales , also called feather - edged scales , are ...
... taking large distances , proportional compasses , & c . , the uses of which are easily learned . ( See Heather's Treatise on Mathematical Instruments . ) PLOTTING SCALES . Plotting scales , also called feather - edged scales , are ...
Page 22
... taking one diagonal , and upon it erecting perpendiculars to all the angles on each side of it . The piece will thus be divided into right angled triangles and trapezoids , the areas of which must be calculated as in the two last ...
... taking one diagonal , and upon it erecting perpendiculars to all the angles on each side of it . The piece will thus be divided into right angled triangles and trapezoids , the areas of which must be calculated as in the two last ...
Page 32
... taking occasionally long offsets , or for squaring of lines ob- structed by buildings , water , & c . Instead of the cross some use the Optical Square for these purposes ; which will be here- after described ; while some erect ...
... taking occasionally long offsets , or for squaring of lines ob- structed by buildings , water , & c . Instead of the cross some use the Optical Square for these purposes ; which will be here- after described ; while some erect ...
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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.