This  we  find  to  be  the  case  with  all  organs  and  even  the
eye  will  lose  its  power  of  sight  and  will  gradually  disap-
pear if  not  required, — as  is  the  case  with  fishes  which
have  acquired  the  habit  of  living  in  dark  caves.  This  we
find  also  to  be  the  case  with  man  in  his  use  of  structures


CONCLUSIONS  447

and  machines ;  whatever  is  found  to  be  of  no  use  or  ser-
vice would  be  abandoned  and  discarded  as  useless.  The
light  does  not  produce  eyes  nor  does  the  vibration  of  the
air  produce  ears.  The  cell  wherever  you  find  him  shows
by  his  actions  the  same  intention  and  purpose  as  man.
In  every  place,  the  actions  are  intelligent  and  voluntary.
The  amoeba,  the  single  cell,  which  lives  in  the  water  and
so  closely  resembles  the  man  building  cell,  can  move  in
any  direction  it  thinks  best,  eat  what  it  thinks  best  and
when  in  danger  escape  from  its  enemies,  and,  under  ex-
ceptionally dangerous  circumstances,  it  can  cover  itself
with  an  extra  tough  and  hard  cover  wherein  it  can  remain
until  the  danger  is  over.  Other  species  of  its  kind  make
and  wear  permanent  covers  of  pearl,  horn  or  flint  wherein
they  live  and  paddle  themselves  around  through  the  water
in  search  of  food.  Others  not  only  cover  themselves  with
armor  but  provide  themselves  with  flash  lights  to  better
see  and  capture  their  food  and  some  make  darts  with
which  they  can  strike  and  capture  their  prey  at  a  dis-
tance. The  other  social  cells  that  multiply  and  aggregate
themselves  into  colonies  and  cell  republics  which  we  call
plants  and  animals,  show  the  same  inventive  skill  as  these
single  cells.  Their  special  skill  consists  mainly  in  being
able  to  produce  large  protective  colonies.
