THE PLANE-TABLE AND ITS USE IN TOPOGRAPHICAL SURVEYING1869 |
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Página 7
... alidade itself . The watch tele- scope has not been used in Coast Survey work . Rollers have been attached to the under side of the table , taking the place of clamps for holding the map in its place ; but these are very liable to get ...
... alidade itself . The watch tele- scope has not been used in Coast Survey work . Rollers have been attached to the under side of the table , taking the place of clamps for holding the map in its place ; but these are very liable to get ...
Página 8
... alidade , it has been somewhat modified and improved . ( See frontis- piece . ) The telescope , instead of being supported on the side of the standard , is " transit mounted , " resting upon an axis which is supported at either end upon ...
... alidade , it has been somewhat modified and improved . ( See frontis- piece . ) The telescope , instead of being supported on the side of the standard , is " transit mounted , " resting upon an axis which is supported at either end upon ...
Página 12
... alidades , as recently improved , the bearings of the axes being unchangeable , save by such violence as . would ... alidade so that the centre of the telescope is in the line of sight of an accurately adjusted levelling instrument ...
... alidades , as recently improved , the bearings of the axes being unchangeable , save by such violence as . would ... alidade so that the centre of the telescope is in the line of sight of an accurately adjusted levelling instrument ...
Página 19
... alidade is carried from station to station by the chief of party , resting on the bend of the arm , or hang- ing easily at the side , and in handling is to be seized by the lower part of the standard , never by the telescope or rule ...
... alidade is carried from station to station by the chief of party , resting on the bend of the arm , or hang- ing easily at the side , and in handling is to be seized by the lower part of the standard , never by the telescope or rule ...
Página 20
... alidade , and it has also been proposed to have the scale drawn upon the sheet , and thus afford a correction of error of shrinkage , but its constant use would soon seriously deface the paper . The pencils , dividers , and India ...
... alidade , and it has also been proposed to have the scale drawn upon the sheet , and thus afford a correction of error of shrinkage , but its constant use would soon seriously deface the paper . The pencils , dividers , and India ...
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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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