A Treatise on Land Surveying in Theory and Practice ...1869 |
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Page 50
... centre , B bank . Combining these , a boundary may be described for some particular case , thus : -W Br , for west bank of river , and N Fw , north face of wall . CHAPTER III . SURVEYING WITH THE CHAIN AND AN ANGULAR 50 ON LAND SURVEYING .
... centre , B bank . Combining these , a boundary may be described for some particular case , thus : -W Br , for west bank of river , and N Fw , north face of wall . CHAPTER III . SURVEYING WITH THE CHAIN AND AN ANGULAR 50 ON LAND SURVEYING .
Page 63
... centre of the earth , corresponding to the triangle . Then from trigonometry sin A ' = . α a 3 r - gives A ' when r is known . And r = 6r 3 ' & c . This 6 a 6 sin A ' + sin3 A ' [ The results from this formula will be sufficiently ac ...
... centre of the earth , corresponding to the triangle . Then from trigonometry sin A ' = . α a 3 r - gives A ' when r is known . And r = 6r 3 ' & c . This 6 a 6 sin A ' + sin3 A ' [ The results from this formula will be sufficiently ac ...
Page 65
... centre of the earth . The gaseous constitution of the atmosphere renders it subject to local variations of density , due to the development of local heat , which rarefies the part heated . From this it may be seen that the path of a ray ...
... centre of the earth . The gaseous constitution of the atmosphere renders it subject to local variations of density , due to the development of local heat , which rarefies the part heated . From this it may be seen that the path of a ray ...
Page 66
... centre of the earth . e the angle at C. ( 4-0 ) . H the horizon of A. and h the horizon of B. Then Bn cote = BC , the distance of B from C , and × CBAC , the distance of A from C. From cos p these we find ( A C - BC ) the difference of ...
... centre of the earth . e the angle at C. ( 4-0 ) . H the horizon of A. and h the horizon of B. Then Bn cote = BC , the distance of B from C , and × CBAC , the distance of A from C. From cos p these we find ( A C - BC ) the difference of ...
Page 67
... centre of the earth from the points A and B , and let AC and R ( = A o ) be known . Also let the angle A o B , subtending A C , be represented by Z. Then CAB + Z = DBA . Putting r ( = AB a ) for the error due to refraction , we haver ...
... centre of the earth from the points A and B , and let AC and R ( = A o ) be known . Also let the angle A o B , subtending A C , be represented by Z. Then CAB + Z = DBA . Putting r ( = AB a ) for the error due to refraction , we haver ...
Contents
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Common terms and phrases
accuracy accurately adjacent angles adjusted already described altitude angular instrument angular point ascer atmospheric refraction axis base line bisection centre chain length chord circular curves clamped collimation computed contained angle contour points convenient correct corresponding determined diagram difference direction district equal error due extremities field field-book flag pole formula forward given ground horizontal limb inclination intermediate points known points laid lines traced lunar distance magnetic angle manner marked measured angle ment meridian observed obstruction obtained opposite sides parallel lines parallelogram parcel perpendiculars plotted point of intersection position prismatic compass protractor purpose reading reference point refraction remote point scale selected spherical spherical excess staff standard length straight line suitable surface configuration survey of detail surveyor tangent telescope temperature theodolite tion triangles trig trigonometrical survey tube verified verniers vertical angles vertical limb vertical plane wand water margins wire zero
Popular passages
Page 291 - The term, however, when used to express the fineness of gold, has a relative meaning only. Every mass of alloyed gold is supposed to be divided into 24 equal parts ; thus the standard for coin is 22 carat fine, that is, it consists of 22 parts of pure gold and 2 parts of alloy.
Page 291 - Measure 144 square inches = 1 square foot 9 square feet = 1 square yard 30J square yards = 1 square rod 160 square rods = 1 acre 640 acres = 1 square mile Cubic Measure 1728 cubic inches = 1 cubic foot 27 cubic feet = 1 cubic yard 128 cubic feet...
Page 305 - HISTORY of MODERN MUSIC; a Course of Lectures delivered at the Royal Institution. By JOHN HULLAH, Professor of Vocal Music in King's College and in Queen's College, London. Post 8vo.
Page 60 - All the interior angles of any rectilineal figure, together with four right angles, are equal to twice as many right angles as the figure has sides.
Page 298 - Nesbit's Mensuration, and Key. A Treatise on Practical Mensuration : containing the most approved Methods of drawing Geometrical Figures; Mensuration of Superficies; Land Surveying; Mensuration of Solids ; the Use of the Carpenter's Rule ; Timber Measure, in which is shewn the method of Measuring and Valuing Standing Timber ; Artificers' Works, illustrated by the Dimensions and Contents of a House; a Dictionary of the Terms used in Architecture, &c.
Page 299 - The School-Books, Atlases, Maps, &c. comprised in this Catalogue may be inspected in the Educational Department of Messrs. LONGMANS and Co. 39 Paternoster How, London, where also all other works published by them may be seen.
Page 252 - ... rectilineal figures are to one another in the duplicate ratio of their homologous sides.
Page 303 - Stevens and Hole's Arithmetical Examination Cards, in Eight Sets, each Set consisting of Twenty-Four Cards. Price Is. per Set. A. Simple Addition and Subtraction. B. Simple Multiplication and Division. C. Compound Rules (Money>. D. Compound Rules (Weights and Measures). E. Practice and Bills of Parcels. F. Vulgar and Decimal Fractions. G. Simple and Compound Proportion.