smith.]  MOLYBDENITE    DEPOSIT    IN    EASTERN    MAINE.  ■  199 
both  the  pegmatite  and  the  wall  rock  appear  favorable,  and  con- 
siderable work  of  this  kind  has  been  done.  The  rock  lying  on  the 
dump  contained  varying  proportions  of  molybdenite,  but  it  seemed 
that  most  of  the  crude  ore  could  be  readily  distinguished  and  sep- 
n rated  from  the  barren  rock  by  hand  picking.  The  crucial  test 
of  the  successful  working  of  such  a  deposit  is  doubtless  connected 
with  the  milling  process  rather  than  with  the  mining  methods. 
A  compact  plant  for  treating  the  molybdenite  ore  has  been 
erected  by  this  company,  but  the  details  as  to  cost  of  crushing  the 
rock  and  of  concentrating  and  cleaning  the  separated  mineral  could 
not  be  ascertained  from  the  representative  in  charge. 
The  successful  development  of  molybdenite  deposits  necessitates  the 
adoption  of  economical  and  well-tested  methods,  both  in  mining  and 
milling.  The  amount  of  development  work  done  on  the  Cooper  dis- 
trict at  the  time  of  the  visit  was  sufficient  to  suggest  the  possibility 
that  a  valuable  industry  may  be  established  here,  but  the  success 
of  the  undertaking  will  depend  largely  upon  careful  business-like 
management. 
