152  CONTRIBUTIONS    TO    ECONOMIC    GEOLOGY,  1904.        [bull*.  260. 
fornia,  which  was  treated  in  the  mills  at  those  properties.  The  old 
Glencoe  property  has  been  reopened  and  the  mill  and  mine  are  being 
put  into  shape  for  regular  work.  In  some  of  the  other  smaller  prop- 
erties, in  which  work  has  been  begun  in  only  comparatively  recent 
times,  development  is  still  actively  in  progress.  After  encountering 
unusual  difficulties  from  water,  the  management  of  the  West  Qnincy 
property  has  effected  an  agreement  whereby  its  ground  will  be  opened 
and  worked  at  a  depth  through  the  Little  Bell. 
In  some  of  the  great  properties  encouraging  results  have  also 
attended  prospecting.  In  the  Daly  West,  a  strong  ore-bearing  fis- 
sure, the  back  vein,  which  has  afforded  considerable  ore  in  the 
adjoining  Daly- Judge  property,  has  been  found,  and  its  ore  is  being 
actively  stoped.  The  great  Daly-Daly  West  vein,  the  main  single 
fissure  of  this  property,  has  been  opened  to  the  1,550-foot  level  and 
found  to  carry  a  large  body  of  milling  ore.  Arrangements  have 
been  perfected  with  the  Ontario  and  Daly  companies  for  extending.! 
the  1,500-foot  level  Ontario  and  1,700-foot  Daly  into  the  Daly  West! 
and  prospecting  its  ground  at  this  depth  (2,100,  Daly  West).  With  a 
view  to  treating  the  increasing  amount  of  milling  ore  yielded  by> 
this  mine,  the  capacity  of  its  concentrating  mill  has  been  consider- 
ably enlarged  and  a  tailings  plant  erected  and  equipped  with  the 
Sherman  classifiers  and  slime-settling  tanks,  Wilfley  tables  (ordi- 
nary), and  Wilfley  slime  tables. 
In  the  Daly-Judge,  exploration  of  virgin  ground  at  a  depth  on 
the  west  has  already  resulted  in  cutting  some  very  high-grade  ore. 
As  a  result  of  prospecting  in  promising  ground  of  the  Daly,  through 
the  Mazeppa  shaft,  those  upper  workings  have  been  closed  and  the  old 
Federal  tunnel  is  being  driven  ahead  to  prove  this  ground  at  a  depth. 
The  other  properties,  large  and  small,  have  maintained  their  regular 
operations. 
These  newly  discovered  ore  bodies,  with  a  single  exception,  occum 
as  veins  in  northeast-southwest  fissures.     The  exception  is  the  re- 
placement ore  in  the  Kearns-Keith,  which  lies  in  beds  in  the  foot  wall' 
of  the  main  fissure  and  takes  the  place  of  portions  of  limestone  strata. 
In  the  Silver  King  and  Daly  West  mines  no  new  bodies  of  high-grade 
w  bedded  "  ore  have  been  recently  found  comparable  to  those  which 
afforded  the  large  shipments  of  crude  ore.     Considerable  areas  of  the 
ore-bearing  limestones  remain  unexplored,  however,  in  each  of  these 
mines,  and  they  are  now  being  extensively  and  thoroughly  prospected 
The  boom  in  1902  resulted  in  an  unprecedented  number  of  new  loca- 
tions, the  incorporation  of  several  large  companies,  and  a  vast  amouni 
of  prospecting.     During  1903  the  mining  industry  gradually  resumed  II 
its  normal  condition,  and  newly  formed  companies  settled  down  tc  j 
persistent,  serious  development  work,     The  last  year,  1904,  has  wit- 
