410 
CONTRIBUTIONS    TO    ECONOMIC    GEOLOGY,  1905. 
They  will  probably  all  burn  to  a  light-bud'  or  cream  color,  and  will  give  a  dense  body 
medium  burning  temperature.  At  present  the  Mountain  Valley  clays  are  shipped  in  sun 
quantity  to  Chicago  for  use  in  art  pottery.  The  other  clays  have  been  used  locally  fi 
brick,  etc. 
So  far  as  the  present  investigation  goes,  it  may  be  said  that  the  clays  on  the  rcscrvatio  i] 
are  of  fair  quality  for  the  purposes  above  named,  but  that  equally  good  clays  occur  outsid  i 
of  the  reservation.  The  deposits  on  North  and  Hot  Springs  mountains,  moreover,  are  s 
located  that  working  them  would  greatly  injure  the  appearance  of  the  park.  If  it  should  b  ■ 
decided  to  work  any  of  the  reservation  clays,  it  would  be  advisable  to  explore  thoroughly 
the  north  flank  of  Sugar  Loaf  Mountain  with  the  hope  of  finding  clays  there  on  the  Govern 
ment  property;  for  at  that  point  a  clay  pit  would  not  injure  the  appearance  of  the  pan 
system.  The  clays  though  useful,  are  not  of  such  great  value  as  to  justify  damage  to  i 
public  park. 
