THE PLANE-TABLE AND ITS USE IN TOPOGRAPHICAL SURVEYING1869 |
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Página 4
... drawn in pencil upon the paper , which is spread upon the table , and the details are filled in according to ... drawing board , with bevelled or rounded edges about thirty inches in length , twenty - four in width , and three - quarters ...
... drawn in pencil upon the paper , which is spread upon the table , and the details are filled in according to ... drawing board , with bevelled or rounded edges about thirty inches in length , twenty - four in width , and three - quarters ...
Página 8
... draw a more extended line upon his sheet than the limits of the rule would permit ; but , as it is liable to the same objection as that instrument , it has not come into general use . A declinatoire , consisting of a rectangular metal ...
... draw a more extended line upon his sheet than the limits of the rule would permit ; but , as it is liable to the same objection as that instrument , it has not come into general use . A declinatoire , consisting of a rectangular metal ...
Página 9
... draw a line along its edge , marking also the lines at the ends of the rule . Reverse the rule , and place the op- posite ends upon the marked points , and again draw the line . If the two lines coincide , no adjustment is neces- sary ...
... draw a line along its edge , marking also the lines at the ends of the rule . Reverse the rule , and place the op- posite ends upon the marked points , and again draw the line . If the two lines coincide , no adjustment is neces- sary ...
Página 11
... draw a line along the fiducial edge ; then reverse the rule 180 ° , again placing the edge along this line , revolve the telescope upon its axis and again observe the object ; if the cross - hairs cover it , the adjust- ment is perfect ...
... draw a line along the fiducial edge ; then reverse the rule 180 ° , again placing the edge along this line , revolve the telescope upon its axis and again observe the object ; if the cross - hairs cover it , the adjust- ment is perfect ...
Página 16
... drawn , and its intersection with the most central parallel deter- mined , at which point the perpendicular B is ... draw lines ( EE ) through the north and south minutes on the central meridian , and tan- gent to the two arcs D D ...
... drawn , and its intersection with the most central parallel deter- mined , at which point the perpendicular B is ... draw lines ( EE ) through the north and south minutes on the central meridian , and tan- gent to the two arcs D D ...
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Términos y frases comunes
25 cents 50 cents accuracy adjustment alidade axis brass BRIDGES centre chain circle clamp Cloth Coast Survey construction contours correct cross-hairs curves declinatoire depression determined diagram direction distance Edition Engineers engravings Feet fiducial edge field forward line forward signal GEOLOGY OF PENNSYLVANIA Graphical Statics ground HAND-BOOK height hills horizontal Hypsometry instrument intersection line of sight lines drawn lithographic plates marked means measured meridian metal method metres middle point minutes of arc Morocco necessary objects observed Paper covers parallel pencils perpendicular placed plane plane-table plotted points point occupied point sought falls PRACTICAL TREATISE Prof projection QUALITATIVE CHEMICAL ANALYSIS resection right angles rule scale sheet shore line side sketching Slide Valve slope station Steam Steel straight edge surveyor taken tangent screw telemeter telescope tion topographer triangle of error triangulation points true point U. S. Navy vertical arc wood-cuts Yale College ZERAH COLburn
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