. Manual for noncommissioned officers and privates of cavalry of the Army of the United States. 1917. To be also used by engineer companies (mounted) for cavalry instruction and training. Again do violence to the face of nature by digging with astick a narrovr inlet opening out of your miniature ocean,and the watermark will now look something like figure 8. Alter your drawing once more and your contour showsagain the new ground form. Drop into your main pond around clod and you will have a new^ watermark, like figure 9,to add to your drawing. This new contour, of the same levelwith the one sho
. Manual for noncommissioned officers and privates of cavalry of the Army of the United States. 1917. To be also used by engineer companies (mounted) for cavalry instruction and training. Again do violence to the face of nature by digging with astick a narrovr inlet opening out of your miniature ocean,and the watermark will now look something like figure 8. Alter your drawing once more and your contour showsagain the new ground form. Drop into your main pond around clod and you will have a new^ watermark, like figure 9,to add to your drawing. This new contour, of the same levelwith the one showing the limit of the depression, shows onthe drawing the round island. Drop in a second clod, this time long and narrow, the water-mark will be like figure 10, and the drawing of it, properlyplaced, will show another island of another shape. Yourdrawing now will look like figure 11. It shows a depression approximately round, off which opena round bay and a long, narrow bay. There is also a roundelevation and a long, narrow one; a long, narrovr ridge, jut-ting out between the tw^o bays, and a short, broad one acrossthe neck of the round bay. 318 MANUAL FOR NONCOMMISSIONED MANUAL FOR NONCOMMISSIONED OFFICERS. 819 Now flood your lake deeply enough to cover up the featuresyon have introduced. The new water line, about as shown bythe dotted line in figure 11, shows the oblong shape of thedepression at a higher level; the solid lines show the shapefarther down; the horizontal distance between the two con-Put together the information each of these contours gives you,and you will see how contours show the shape of the the little map you have drawn you have introduced all thevarieties of ground forms there are; therefore all contour forms. The contours on an ordinary map seem much more compli-cated, but this is due only to the number of them, their length,and many turns before they finally close on themselves. Orthey may close off the paper. But trace each one out,
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