128 BB. ROSATRE AND JOSEPH EY ADEER 
The writers attempted to ascertain whether the spacing factor 
exercised any control over the amount of misclosure in the traverses 
analyzed. The average spacing of dips on these traverses varied from 
1,400 to 2,400 feet, with a very few lying outside of this range. For 107 
of the traverses, selected at random, the amount of misclosure was 
plotted along the horizontal axis of a graph, while the average spacing 
of dip determinations in the same traverse was laid off vertically. The 
resulting diagram is shown in Figure 3. 



5 a § a $ 
Dip Spacing in Hundreds of Feet 
wi 
FIGURE 3. 

100 200 400 600 B00 19000 
Misclosure in Fee} 
Fic. 3.—Comparison of average spacing of dips with misclosure of traverse. Chart 
shows no apparent relationship. 
An inspection of the figure reveals a scattering of points through 
which no mean curve could justifiably be drawn. This negative result 
is probably explainable by the lack of variety in the several traverses 
considered. It serves to demonstrate, however, that for the dip spac- 
ing used in the work analyzed, the spacing exercised little if any effect 
on the amount of misclosure. Considering also the surprisingly small 
size of the probable angular misclosure obtained, this result suggests 
that no closer spacing is necessary, and indeed, that an even wider 
spread than the average one used might be practicable. The average 
spread on the traverses studied from the shot point to the middle 
geophone was 1,700 feet. 
650 
