emmons]  INVESTIGATION    OF    METALLIFEROUS    ORES.  21 
(3)  The  Porcupine  Placer  Mining  District,  by  Charles  W.  Wright. 
This  describes  a  comparatively  new  placer  district,  also  in  south- 
eastern Alaska,  to  the  northwest  of  the  Lynn  Canal. 
(4)  The  Gold  Placers  of  the  Fairbanks  District,  by  L.  M.  Prindle. 
This  describes  the  geology  and  placers  of  a  new  district  about  which 
there  was  some  excitement  during  the  past  season  in  the  upper 
portion  of  the  Tanana  Valley. 
(5)  The  Kotzebue  Placer  Gold  Field  of  the  Seward  Peninsula,  by  F.  H.  Moffit. 
This  describes  the  placer  developments  on  the  northeast  slope  of 
the  Seward  Peninsula  along  the  shores  of  Kotzebue  Sound. 
(6)  Tin  Deposits  of  the  York  Region,  Alaska,  by  Arthur  J.  Collier. 
This  gives  an  interesting  description  of  the  newly  discovered  tin 
deposits  at  the  western  extremity  of  the  Seward  Peninsula,  which  are 
among  the  few  occurrences  of  ore  in  place  yet  opened  in  this  extreme 
northern  region.  Although  the  developments  are  as  }Tet  too  limited 
to  afford  an  entirely  satisfactory  idea  of  the  manner  of-  occurrence  of 
the  ore,  they  afford  valuable  data  with  regard  to  their  mineral  associ- 
ation. They  occur  generally  in  or  near  bodies  of  granite,  but  it  is 
not  yet  certain  whether  they  are  all  strictly  contact  phenomena. 
APPALACHIAN    REGION. 
During  the  field  season  of  1903  various  reconnaissance  examinations 
of  metalliferous  deposits  have  been  made  in  the  Appalachian  region. 
The  following  are  noticed  in  the  succeeding  pages: 
Gold  Quartz  Veins  in  Maine  and  Vermont,  by  George  Otis  Smith. 
This  is  the  result  of  an  examination  of  various  quartz  veins  which 
were  said  to  cany  gold  in  paying  quantities. 
Notes  on  Cupriferous  Deposits  of  Vermont,  by  W.  H.  Weed. 
Some  Georgia  Copper  Deposits,  by  W.  H.  Weed  and  T.  L;  Watson. 
Notes  on  Copper  Deposits  in  New  Jersey,  by  W.  II.  Weed. 
The  first  two  deposits  noted  belong  to  the  general  zone  of  large 
pyritiferous  deposits  in  the  crystalline  rocks  which  stretch  along  the 
front  face  of  the  Appalachians  from  Georgia  to  Nova  Scotia. 
The  New  Jersey  deposits  are  associated  with  the  sandstones  and 
traps  of  the  Newark  system. 
These  are  reports  of  preliminary  observations  made  in  a  general 
investigation  of  the  cupriferous  deposits  of  the  entire  Appalachian 
system. 
Recent  Zinc  Mining  in  East  Tennessee,  by  Arthur  Keith. 
This  gives  the  result  of  an  examination  of  zinc  deposits  in  the  upper 
part  of  the  Knox  dolomite,  in  the  center  of  the  eastern  Tennessee 
Valley  between  Knoxville  and  Morristown.     The  ores,  which  are  zinc 
