spurr.]  ORES   OF   GOLDFIELD,   NEV.  139 
always,  an  indication  of  rich  ore  in  the  January.  According  to  Mr. 
Hamilton,  several  of  the  Blue  Bull  samples"  show  bismuth.  Barite 
is  a  common  mineral  in  all  these  deposits,  but  is  not  abundant. 
The  indications  are,  therefore,  not  unfavorable  to  the  continuance 
of  ores  of  high  grade,  or  at  least  of  good  grade,  down  to  considerable 
depths.  There  is,  however,  as  already  demonstrated  by  exploita- 
tion, no  continuous  regularity  to  the  ore  shoots,  whether  sulphide  or 
oxidized.  They  are  curving,  irregular,  and  often  lenticular,  but  it 
may  happen  that  below  a  shoot  Avhich  lias  come  to  an  end  another 
shoot  may  be  found  occupying  a  slightly  different  relative  position, 
or  even  overlapping  the  first. 
■  Page  137,  footnote. 
