188  Field  Columbian  Museum — Reports,  Vol.  i. 
either  in  the  ruins  or  abandoned  burial  grounds,  and  the  expedition 
confined  its  attention  to  the  collection  of  objects  of  ethnographic 
interest.  The  collection  made  at  the  Pueblo  of  Oraibi  of  the  Mokis 
is  quite  full  and  complete.  This  was  possible  from  the  fact  that 
Oraibi  is,  of  all  the  Pueblos  of  the  Southwest,  the  most  primitive 
and  least  contaminated  by  white  contact. 
In  September,  Mr.  Farrington,  Curator  of  Geology,  made  a  trip 
to  the  caves  of  Kentucky  and  passed  some  time  in  collection  and 
study.  A  large  amount  of  material  illustrative  of  cave  formation  was 
secured  and  arrangements  were  made  which  will  probably  result  in 
securing  to  the  Museum  later  a  unique  collection  in  this  line.  On  the 
same  trip  the  Nashville  exposition  was  visited  and  a  number  of 
specimens  obtained  for  the  Museum  from  exhibitors  there.  The 
Assistant  Curator  of  Geology  spent  two  weeks  in  July  in  the  "Boston 
Basin,"  collecting  material  illustrative  of  points  of  structure  and 
dynamic  geology  and  lithology.  As  he  had  a  previous  acquaintance 
with  the  region  the  amount  of  material  secured  was  large  and 
valuable.  A  complete  series  of  specimens  illustrative  of  the  forma- 
tion of  soil  from  diabese,  a  series  of  veins  and  dikes,  and  a  collection 
of  the  acid  and  basic  volcanic  rocks  of  the  region  were  chief  among 
the  specimens  obtained. 
Mr.  Millspaugh,  Curator  of  Botany,  in  the  prosecution  of  his 
efforts  to  make  a  collection  of  the  forestry  of  North  America,  visited 
during  the  year,  Northern  Mississippi,  Southern  Illinois  and  Eastern 
West  Virginia  collecting  specimens,  gathering  data  and  taking  photo- 
graphs in  pursuance  of  a  plan  in  behalf  of  this  division  of  his  depart- 
ment as  outlined  in  the  following  report  to  the  director: 
"The  need  in  a  great  commercial  center  of  not  only  an  adequate 
but  authentic  reference  collection  exploiting  the  commercial  timbers 
of  North  America  is  not  only  urgent  but  of  the  greatest  moment  to 
business  men,  railroad  systems,  builders  and  contractors,  and  to 
students  and  teachers  in  the  central  west.  To  this  end  this  depart- 
ment has  undertaken,  on  a  comprehensive  scale,  the  amassing  of  a 
complete  series  of  monographs  that  shall  adequately  represent  the 
most  essential  and  educational  features  of  our  North  American  for- 
ests, in  which  work  the  Museum  is  being  ably  seconded  by  the 
different  railway  systems  of  the  country  to  which  such  a  collection 
appeals  with  great  force.  Although  the  building  up  of  these 
monographs  entails  a  careful  and  considerate  selection  of  material, 
scientific  accuracy  in  each  detail  and  a  large  amount  of  travel  and 
association  with  all  branches  of  lumbering,  from  the  tree-feller  in 
the  forest,  the  sawyer  in  the  mill,   and  the  manufacturer  in  his 
