Practical Surveying: A Text-book for Students Preparing for Examinations Or for Survey-work in the ColoniesC. Lockwood and Son, 1889 - 272 Seiten |
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Seite 2
... equal to one foot in length , and in the latter 7.92 in . , or 1-100th part of 66 feet , being the length of the link . It will be manifest that the 100 - feet chain has many great advan- tages , the chief being that it is so easily ...
... equal to one foot in length , and in the latter 7.92 in . , or 1-100th part of 66 feet , being the length of the link . It will be manifest that the 100 - feet chain has many great advan- tages , the chief being that it is so easily ...
Seite 3
... equal one furlong , and eight furlongs or eighty chains equal one mile . Again , an acre of land is ten square chains . Offset Staff . Besides the chain , the surveyor should be pro- vided with a small staff or rod ( called an offset ...
... equal one furlong , and eight furlongs or eighty chains equal one mile . Again , an acre of land is ten square chains . Offset Staff . Besides the chain , the surveyor should be pro- vided with a small staff or rod ( called an offset ...
Seite 4
... equal parts ( one link each ) , and painted alter- nately black and white , or black , white , and red , or red and white , and I have known them to be painted blue and white ( this of course is entirely a matter of fancy ) . Red and ...
... equal parts ( one link each ) , and painted alter- nately black and white , or black , white , and red , or red and white , and I have known them to be painted blue and white ( this of course is entirely a matter of fancy ) . Red and ...
Seite 20
... equal to the base of a right - angled triangle . ' In the case of Fig . 29 , if we plotted the line A B exactly as measured along the slope , which in this case is 715 links , we should make our line 24-31 links longer than it should ...
... equal to the base of a right - angled triangle . ' In the case of Fig . 29 , if we plotted the line A B exactly as measured along the slope , which in this case is 715 links , we should make our line 24-31 links longer than it should ...
Seite 26
... equal 40 , вс 30 , and CA 50 links . 40 Chain Links ▻ Line > 50 Links B30 Links C Fig . 40 . I have said this may be done approximately on level ground , but I do not recommend any reliance being placed upon a right angle set out in ...
... equal 40 , вс 30 , and CA 50 links . 40 Chain Links ▻ Line > 50 Links B30 Links C Fig . 40 . I have said this may be done approximately on level ground , but I do not recommend any reliance being placed upon a right angle set out in ...
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accuracy accurately adjusted arrow axis back and fore back-sight beam compasses bench-mark boundaries centre chain chain-line chords clamped clinometer colour commencement compass consequently Cosec cosine cross-staff cross-wires curve direction distance ditch divided DUMPY LEVEL end of line equal feet fence field-book figures fixed fore sight ground hedge hypotenuse illustration inch instrument intermediate intersection length line A B line of collimation logarithm mark means measured necessary observed offsets parallel plate pencil perpendicular plane plot plumb-bob position post-and-rail fence quadrant radius ratio reading reference represent right angles scale screw secant seen sextant shown side sine sketch square staff station straight line survey surveyor take the angle tangent tangential angle telescope theodolite tion traverse triangle trigonometry upper vernier whilst Wimbledon Park wires zero دو دو
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Seite 86 - If two triangles have two sides of the one equal to two sides of the...
Seite 89 - IF a straight line fall upon two parallel straight lines, it makes the alternate angles equal to one another; and the exterior angle equal to the interior and opposite upon...
Seite 85 - When a straight line standing on another straight line makes the adjacent angles equal to one another, each of the angles is called a right angle ; and the straight line which stands on the other is called a perpendicular to it.
Seite 61 - When you have proved that the three angles of every triangle are equal to two right angles...
Seite 85 - A circle is a plane figure contained by one line, which is called the circumference, and is such, that all straight lines drawn from a certain point within the figure to the circumference are equal to one another : 16.
Seite 92 - In any right-angled triangle, the square which is described on the side subtending the right angle is equal to the sum of the squares described on the sides which contain the right angle.
Seite 116 - In any plane triangle, as the sum of the sides about the vertical angle is to their difference, so is the tangent of half the sum of the angles at the base to the tangent of half their difference.
Seite 85 - A plane rectilineal angle is the inclination of two straight lines to one another, which meet together, but are not in the same straight line.
Seite 127 - As the sum of the two given sides Is to their difference, So is the tangent of half the sum of their opposite angles To the tangent of half the difference of the same angles.
Seite 85 - A diameter of a circle is a straight line drawn through the centre, and terminated both ways by the circumference.