770 



ELECTRICAL METHODS 



[Chap. 10 



VsZ, ga/vmHic adf 



VsZ, indudivt ontf 



XsZ, ga/y. pkis iodud 



n\v>{{*>\\S>«J'* \ m-^f^^ 



(c) 



w 



VsZ. qekjod-^norm^ 



v\w/^^\svy//Ws\sy//W-t^ 



(d) 



Fig. 10-92. Horizontal and vertical field components due to galvanic and inductive 

 action of vertical ore bodies. 



DishuKffnm 

 eledrode box 



tteo mo im ttso tsoo uso uoo 



Fig. 10-93o. Normal field components for profile, at right angles to electrode basis 

 of 200 m length, taken with 30 cycles (after Mueller). 



