...Similarly, for b and b' on the 900-ft. level, arcs swung with m'n' as a radius locate the crest so far as 6 and b' are concerned. Continuing this process for the intersection of each contour-line and the property-Hue, we obtain a series of arcs. The innermost arc, or the one towards the uphill side, limits...

...crest cannot come within the distance mn of a or a' without having the dump over-run the FIG. 9. [12] side-line. From a and a', then, swing arcs with mn...obtain a series of arcs. The innermost arc, or the one towards the uphill side, limits the crest. Drawing a fair line tangent to the inside arcs, we have...

...so far as a and a" are concerned. Similarly, for b and b' on the 900-ft. level, arcs swung with m' n as a radius locate the crest so far as b and b' are...Continuing this process for the intersection of each contour line and the property line, we obtain a series of arcs. The innermost arc or the one terial...

...b and b' on the 900-ft. level, arcs swung with m'n' as a radius locate the crest so far as b and 6' are concerned. Continuing this process for the intersection...obtain a series of arcs. The innermost arc, or the one towards the uphill side, limits the crest. Drawing a fair line tangent to the inside arcs, we have...