THE PLANE-TABLE AND ITS USE IN TOPOGRAPHICAL SURVEYING1869 |
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Página 7
... square brass plates joined by screws , and supporting horizontally a conical journal , through which extends a closely fitting cone of brass , coming from and attached to the side of the telescope . This cone forms the axis of the ...
... square brass plates joined by screws , and supporting horizontally a conical journal , through which extends a closely fitting cone of brass , coming from and attached to the side of the telescope . This cone forms the axis of the ...
Página 8
... square columns , having their bases upon a square plate forming the top of the standard , the support and standard being firmly united . This arrangement brings the centre of gravity over and coincident with that of the standard ...
... square columns , having their bases upon a square plate forming the top of the standard , the support and standard being firmly united . This arrangement brings the centre of gravity over and coincident with that of the standard ...
Página 61
... square of the distance , and amounts to 0.22 foot in 1,000 metres , including the effect of ordinary refraction . As with the instruments under consideration extreme accu- racy is not attainable , it is plain that for distances under ...
... square of the distance , and amounts to 0.22 foot in 1,000 metres , including the effect of ordinary refraction . As with the instruments under consideration extreme accu- racy is not attainable , it is plain that for distances under ...
Página 62
... square 30.2 multiply by 0.22 second term 6.64 sum 194.7 = difference of elevation in feet . The above formula is near enough for distances up to ten and fifteen miles , and will not differ by as much as a foot from the result of a ...
... square 30.2 multiply by 0.22 second term 6.64 sum 194.7 = difference of elevation in feet . The above formula is near enough for distances up to ten and fifteen miles , and will not differ by as much as a foot from the result of a ...
Página 15
... Square 32mo . Limp . 50c Weights and MEASURES . An Account of the Decimal System , with Tables of Conversion for Commercial and Scientific Uses . By B. F. CRAIG , M.D. Alexander's Dictionary of Weights and Measures . New Edition . D ...
... Square 32mo . Limp . 50c Weights and MEASURES . An Account of the Decimal System , with Tables of Conversion for Commercial and Scientific Uses . By B. F. CRAIG , M.D. Alexander's Dictionary of Weights and Measures . New Edition . D ...
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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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