Surveying, with sections on map reading. military sketching and topographic drawing (1919)
United States. War dept. Committee on education and special training. [from old catalog] · Washington · leaf 137
Fig. 20. 5. What do the two lines C and D in reticule of the telescope in the above Figure represent? 6. Does the distance CD in figure represent th« rod intercept? 7. What is the formula for the distance from instrument to the rod? 8. What is the fundamental principle of the stadia? WAR DEPARTMENT… … FIs. 21. 9 Do the letters (a) and (b) in the figure represent the position of theupper and lower stadia wires? 10. Does AB represent the rod intercept? 11. Will any ray of light from (a) or (b) which passes through O become parallel to the axis of the telescope after passing through the lens? 12.…
Surveying · Military topography · Topographical drawing
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