ELECTRICAL ACTIVITY OK ORE BODIES. 



337 



Table VIII — Continued. 

 FOURTH SERIES. 



FIFTH SERIES. 



VII' 



vm 



SIXTH SERIES. 



VH' 

 vm 



4- 8 



+ 26 



- 26 



4- 20 



4- 51 



4- 21 



4- 18 



- 7 



- 7 



400-foot level. — TliG permanent contact on the 400-foot level was placed in a 

 ferruginous clay seam, toward the southern end of the drift, and observa- 

 tions were made in a northerly direction from this point. The temporary 

 contacts have been designated on the map (Fig. 27), as in the previous case. 

 Point X. of the present survey coincides in position with XV. of the line on 

 the 500-foot level. The following table (IX.), in which full statements of 

 the position, etc., of the points are contained, will be intelligible without fur- 

 ther description. As before, the bearing of the main linear loci only have 

 been determined, the data referring to the lines joining the consecutive 



points, for which figures are given. Resistances, as above, are mean values 

 22 L 



