INVESTIGATION  OF  METALLIFEROUS  ORES. 
By  S.  F.  Emmons. 
ECONOMIC   PUBLICATIONS   OF  THE  YEAR  1904. 
The  list  of  publications  on  subjects  connected  with  the  investiga- 
ion  of  metalliferous  ores  that  have  appeared  during  the  year  1904  is 
onger  than  that  for  1908.     Chance  has  much  to  do  with  such  annual 
iriation,  for  the  reason  that  in  an  organization  like  the  present  Sur- 
rey, whose  work  covers  an  enormous  area  and  has  to  do  with  a  variety 
f  subjects  that  do  not  ordinarily  come  under  the  charge  of  a  geolog- 
*al  survey,  and  whose  publications  are  all  handled  by  one  set  of  men, 
hose  of  one  branch  often  have  to  wait  on  those  of  another,  and  the 
ime  that  must  elapse  between  the  completion  of  the  manuscript  by 
he  author  and  its  issue  by  the  Public  Printer  is  necessarily  variable, 
f  it  happens  to  be  handed  in  when  there  are  not  many  ahead  of  it, 
t  may  appear  in  a  relatively  short  time.  On  the  other  hand,  if  a 
lumber  of  other  reports  have  the  right  of  way,  it  may  be  weeks,  or 
ven  months,  before  it  can  be  taken  up. 
The  list  embraces  the  following  publications : 
fonograph  XLVII: 
Treatise  on  Metamorphism,  C.  R.  Van  Hise. 
pfessional  Papers: 
No.  12.  Ore  Deposits  of  the  Globe  District,  Arizona,  F.  L.  Ransorae. 
No.  21.  Geology  and  Ore  Deposits  of  the  Bisbee  Quadrangle,  Arizona,  F.  L. 
Ransome. 
No.  24.  Zinc  and  Lead  Deposits  of  Northern  Arkansas,  George  I.  Adams,  A. 
H.  Purdue,  E.  F.  Burchard. 
No.  25.  Copper    Deposits    of    the    Encampment    District.    Wyoming,    A.    C. 
Spencer. 
No.  26.  Economic  Resources  of  the  Northern  Black  Hills,  J.  D.  Irving.  T.  A. 
Jaggar,  jr.,  S.  F.  Emmons. 
No.  27.  Geological  Reconnaissance  Across  the  Bitterroot  Range  and  Clear- 
water Mountains,  Montana  and  Idaho,  by  Waldemar  Lindgren. 
(In  press:) 
No.  36.  Lead,  Zinc,  and  Fluorspar  in  Western  Kentucky,  by  W.  S.  Tangier 
Smith  and  E.  O.  Ulrich. 
No.  38.  Economic  Geology  of  Bingham  Mining  District,  by  J.   M.  Boutwell, 
A.  Keith,  and  S.  F.  Emmons. 
No.  42.  Geology  of  Tonopah  Mining  District.  Nevada,  by  J.  E.  Spurr. 
No.  43.  Copper  Deposits  of  Clifton-Morenci,  Arizona,  by  W.  Lindgren. 
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